← Surfer · Sage hub

Sage — Reproductive / Infertility: Mitochondrial Engine of Gametes

Surfer Coach Sage

1. Framing — compensatory cascade → reproduction as energy-expensive function

Infertility affects roughly one in six couples globally and exacts a heavy personal, relational, and societal toll. The prevailing clinical paradigm organizes causes into ovulatory disorders, tubal/peritoneal factors, uterine abnormalities, male-factor semen defects, diminished ovarian reserve, and a large residue of unexplained infertility. Diagnostic pathways rely on endocrine assays (AMH, FSH, estradiol, progesterone, testosterone, prolactin), imaging, semen analysis, genetic testing, and, increasingly, preimplantation genetic testing for aneuploidy (PGT-A). Treatment escalates from lifestyle advice and ovulation induction through intrauterine insemination to IVF/ICSI with or without genetic screening, surgical correction, and, when gamete quality limits success, donor gametes or gestational carriers. These tools have enabled many births. I respect their empirical grounding and their utility in defined subsets of patients.

Yet the model remains incomplete for a substantial and growing fraction of cases. Unexplained infertility still accounts for a large share of presentations. Oocyte quality — rather than quantity alone — emerges as a major limiter of IVF success as maternal age rises, with embryo aneuploidy increasing with age despite laboratory refinements. Sperm DNA fragmentation and motility defects can persist without an identifiable genetic or anatomic cause. Obesity consistently elevates risk and worsens ART outcomes in a dose-dependent fashion in women, and in men as well; related metabolic comorbidities—insulin resistance, type 2 diabetes, and metabolic syndrome—are likely to act similarly, yet all are often framed as secondary "inflammation" or hormonal noise rather than direct cellular drivers. Early miscarriage rates remain higher even after euploid embryo transfer in women with obesity.

The standing rule (Compensatory-cascade) applies: when ATP load exceeds ATP-generating capacity, the system reverts to more primitive nests of energy production to defend persistence. Acute emergency-mode can be adaptive. Chronic lock-in is what we call disease. Meiotic spindle failure, flagellar ATP shortfall, DNA fragmentation, implantation energetics failure, and “unexplained” infertility are readable as chronic-mode expressions on the reproductive dashboard — not freestanding villains inventing disease beside the engine.

Stay monist: Shore / Surf Judge language names orientation inside one field — not a second “mind stuff” beside mitochondria, and not a moral story in which “hormones as evil” invents infertility independent of cellular fuel handling (Dashboard-discipline: map ≠ terrain). The bioenergetics here follows Nick Lane’s work; cascade framing, Surfer/Energy Phase, and EN overlay are EnSurf’s own extensions, not Lane’s claims.

I propose an upstream reframing: many forms of infertility — particularly age-related, metabolic, and unexplained — originate as a primary cellular energy crisis within oocytes, spermatozoa, supporting gonadal cells (granulosa, theca, Sertoli, Leydig), and endometrial/decidual tissues. Mitochondrial inefficiency creates a bioenergetic deficit that impairs ATP-intensive steps of gametogenesis and early embryogenesis, elevates mtROS, damages DNA, compromises spindle integrity and calcium signaling, and generates a selective landscape in which lower-quality gametes gain relative advantage or simply persist. Systemic metabolic dysfunction amplifies the defect. Aging—the strongest single risk factor—is linked to declining mitochondrial quantity and quality within the long-lived primordial oocyte pool, although human oocytes do not appear to accumulate mtDNA mutations with age; damage may also accumulate across spermatogenic generations.

2. Where conventional hormonal-genetic-ART paradigms fall short

The hormonal-genetic-ART framework correctly identifies that ovulation requires coordinated gonadotropin action, that tubal patency and endometrial receptivity matter, that semen parameters predict natural and assisted success, and that aneuploidy rises with maternal age. It has produced effective interventions for anovulatory PCOS, hypogonadotropic hypogonadism, obstructive azoospermia, and severe male factor via ICSI. Large registries document incremental improvements with vitrification and blastocyst culture, while the added value of time-lapse selection is less certain.

Gaps nevertheless accumulate. Oocyte quality decline with age is acknowledged yet often reduced to "ovarian aging" or telomere attrition without a unifying cellular mechanism that could also explain why metabolic syndrome may accelerate a similar phenotype in younger women, as maternal obesity alters oocyte mitochondria in mice. Sperm DNA fragmentation is measured and sometimes treated with antioxidants, but the mitochondrial midpiece sheath — source of ATP for motility and a major ROS generator when dysfunctional — receives less mechanistic attention. Unexplained infertility may coexist with subtle metabolic derangements (elevated fasting insulin, visceral adiposity, low-grade inflammation) that standard workups do not prioritize. ART success remains heavily age- and metabolism-dependent; euploid embryo transfer does not eliminate the gap between metabolically healthy and compromised patients. Prevention receives far less emphasis than rescue technologies. Current enthusiasm for AI and big-data analytics to embryo selection and stimulation personalization operates within the same downstream frame; without addressing root bioenergetic competence, these tools risk optimizing around, rather than resolving, the primary limitation.

3. The mitochondrial-metabolic hypothesis

The hypothesis begins one layer upstream. In this hypothesis, mitochondrial dysfunction—impaired oxidative phosphorylation, reduced ATP generation, and elevated mtROS—within reproductive cells initiates a cascade that secondarily produces the phenotypes observed clinically.

Oocytes. Mitochondria are inherited exclusively from the mother and must supply all energy for maturation, fertilization, and cleavage until embryonic genome activation; their number, membrane potential, and distribution are critical. Declining NAD+ levels, impaired mitochondrial function, and oxidative damage to spindle apparatus and DNA are linked, largely in animal studies, to the spindle errors, chromosome misalignment, and reduced developmental competence that characterize advanced maternal age and metabolically stressed oocytes; whether aged oocytes accumulate mtDNA mutations is disputed.

Spermatozoa. The mitochondrial sheath powers flagellar motility; dysfunction is linked to asthenozoospermia, while mtROS can damage sperm, and high DNA fragmentation indices are linked to miscarriage.

Supporting cells and endometrium. Mitochondrial impairment can alter steroidogenesis (shown in Leydig cells in culture) and may affect theca steroidogenesis, folliculogenesis (granulosa), and paracrine signaling. Endometrial and decidual mitochondrial competence may influence implantation energetics, vascular remodeling, and immune modulation.

Systemic amplifiers. In this model, hyperinsulinemia providing excess glucose yet promoting ROS and inflammation; sedentary behavior reducing biogenesis stimuli; circadian disruption impairing mitophagy and hormonal rhythms; modern dietary patterns supplying excess refined carbohydrate while often lacking mitochondrial cofactors — create chronic stress that accelerates these processes (Fuel · Obesity · Diabetes · Thyroid adjacency).

In this model, natural selection or differential survival within heterogeneous gamete or follicular populations can lock in lower-quality phenotypes when energy deficit favors rapid, low-fidelity states over high-fidelity, high-energy ones. In this model, genetic and epigenetic alterations arise secondarily from mtROS-induced damage and replication stress. In this model, hormonal imbalances (elevated androgens in PCOS, altered estrogen/progesterone ratios) and inflammatory cytokines further shape the selective landscape but are frequently downstream amplifiers rather than root initiators. Naming hormones as amplifiers is not authorization to invent HRT or peptide dosing protocols on this page.

This reframing aims to unify observations that appear disparate under conventional classification; it predicts that age-related fertility decline tracks mitochondrial metrics more closely than simple follicle count, that metabolic syndrome impairs both sexes through overlapping cellular mechanisms, that "unexplained" cases often harbor occult bioenergetic or oxidative defects, and that ART outcomes improve when host metabolic health is optimized even when stimulation and laboratory variables are held constant—though embryo mtDNA content has not predicted outcomes so far, and a large lifestyle trial before treatment did not raise healthy births.

4. Empirical soundness — observations reframed

Convergent evidence supports the hypothesis. Mitochondrial changes are documented in oocytes from older women and from women with endometriosis (reduced mtDNA copy number and abnormal mitochondria), and maternal obesity raises oocyte ROS in mice. Sperm mitochondrial membrane potential correlates with motility, and obesity is linked to lower sperm mitochondrial activity alongside higher DNA fragmentation. Classic cytoplasmic transfer and mitochondrial supplementation experiments in animal models have improved oocyte competence and embryo development. Epidemiological data show strong, graded associations between maternal and paternal BMI and both natural and ART fertility outcomes; weight loss and exercise improve pregnancy rates and ovulation in some trials, but have not consistently improved births. Oxidative stress markers in follicular fluid track with poorer embryo quality, and may respond to metabolic interventions.

Particularly compelling is preclinical work on NAD+ repletion named in the essay. Landmark studies (Bertoldo et al., Cell Reports, 2020; Miao et al., 2020) demonstrated that oocyte NAD+ levels decline with age in mice; supplementation with the NAD+ precursor nicotinamide mononucleotide (NMN) restored NAD(P)H, improved spindle assembly and chromosome alignment, increased oocyte yield after stimulation, showed a trend toward better blastocyst formation, and, at the lower dose tested, improved natural breeding outcomes. Parallel male-model work with nicotinamide riboside (NR) and NMN in NAD+ depletion or testicular stress has restored spermatogenesis parameters and reduced oxidative DNA damage in some studies, though high-dose injected NMN harmed sperm in one mouse study. Human translation is beginning (registered trials are set to evaluate NR in women of advanced maternal age undergoing ART); mechanistic and smaller interventional data continue to accumulate. These findings are mechanistically coherent with the hypothesis: NAD+ supports mitochondrial biogenesis and function (via SIRT1, including SIRT1/PGC-1α signaling), sirtuin-mediated antioxidant and repair functions, and ETC efficiency in non-reproductive tissues — processes thought to be compromised in aging and metabolically stressed gametes. Naming of NMN/NR as hypothesis-relevant substrates is not a clinical dosing protocol and not a guarantee of live birth. When an NAD+ precursor is considered in addition to proper human diet, this hypothesis discusses low-dose IR nicotinic acid (NA); NR/NMN are not the default. Information, not a recommendation. Education only; no dosing.

The hypothesis also reframes variable penetrance and therapeutic ceilings. Genetic predispositions create vulnerability, and in this hypothesis progression to clinically significant infertility is amplified when mitochondrial function is already compromised by diet, obesity, sedentary behavior, or circadian disruption. ART can bypass some barriers (ICSI for severe asthenozoospermia, PGT-A for aneuploidy) but, in this hypothesis, cannot restore the underlying bioenergetic competence of gametes or endometrium, which would explain residual failure, miscarriage, and the persistent age/metabolic gradient even after euploid transfer.

5. Superior parsimony and comprehensiveness

Occam’s razor favors fewer primary entities with equal or greater explanatory reach. The conventional model requires multiple semi-independent processes — hormonal dysregulation, genetic lesions, anatomic obstruction, oxidative stress as epiphenomenon, and laboratory rescue — to converge on infertility. The mitochondrial-metabolic hypothesis reduces these to one upstream defect: cellular energy-handling failure that impairs high-ATP reproductive processes, generates damaging ROS and DNA lesions, and creates selective conditions favoring or tolerating lower-quality gametes. Genetic, hormonal, and inflammatory findings become modulated consequences and amplifiers. The framework unifies age-related decline, metabolic comorbidities, unexplained infertility, sperm DNA fragmentation, oocyte aneuploidy risk, and implantation challenges under a single coherent mechanism grounded in bioenergetics and evolutionary physiology. Reproduction is energetically costly; in this hypothesis it is therefore sensitive to mitochondrial engine status and modern environmental mismatch. This aligns with the broader mitochondrial-metabolic hypotheses advanced for aging, cancer, and atherosclerosis.

6. Why the conventional paradigm is structurally limited / Surf Judge

  • AMH, FSH, antral follicle count, semen parameters, and PGT-A are indispensable dashboards. They are not the organism’s Level 0–1 field (Dashboard-discipline: map ≠ terrain).
  • Stimulation protocols and laboratory rescue excel at downstream description and rescue but struggle to restore competence when the cellular engine remains compromised.
  • Antioxidant theater against sperm DNA fragmentation without Fuel, circadian, and strength board work often treats ROS as freestanding villain rather than mtROS from a stressed midpiece.
  • “Unexplained” infertility that coexists with occult insulin resistance and visceral adiposity is often unexplained only because the metabolic engine was never prioritized.
  • Euploid transfer that still fails in metabolically compromised hosts is a ceiling signal, not proof that genetics exhausted the story.
  • Institutional incentives favor identifiable lifelong stimulation and laboratory cycles over root-cause restoration that may reduce long-term rescue demand — complementarity with REI, not ideology against it.

Treating the dashboard as the disease while mismatch continues is the Good Doctor’s named error mode. Treating the constraint — restore oxidative capacity, metabolic flexibility, circadian order, gonadal and endometrial mitochondrial competence — is both/and with indicated ART.

7. Frugal restoration — three pillars plus the mitochondrial support named in the essays (hypothesis logic, not orders)

If mitochondrial bioenergetic failure and its downstream effects on gamete quality and selection are root or central enablers, therapy begins with engine restoration alongside — not instead of — conventional diagnostics and ART when indicated. The bullets below are hypothesis language, not a home protocol, not clinical dosing schedules, and not peptide/HRT/GLP-1 invention.

  • Fuel: Strategic moderation of refined carbohydrates and insulinogenic load to limit glucose/insulin drive and oxidative stress while preserving host resilience; nutrient-dense whole foods (animal proteins and fats supplying bioavailable cofactors; fermented foods for metabolic flexibility) that, in this framework, support mitochondrial function. The essays name targeted mitochondrial substrates — particularly NAD+ precursors — which this hypothesis discusses, when considered beyond diet, as low-dose IR nicotinic acid (NA), with NR/NMN not the default (information, not a recommendation; no dosing) — as addressing documented age- and stress-related NAD+ decline, with preclinical fertility rescue signals, though one male mouse study found harm at a high injected NMN dose; human trials are only beginning. Additional cofactors named in the essays may further support ETC function and biogenesis and have their own pages: CoQ10 has supporting mouse data and early human IVF data, while creatine, PQQ, and methylene blue (in appropriate contexts) are untested for fertility. Time-restricted eating or judicious ketogenic approaches may enhance metabolic flexibility where medically appropriate — not a Surfer challenge, and not for every candidate. Hypothesis, not a branded diet order or retail stack prescription.
  • Circadian: Shift and night work are linked to menstrual disruption and early pregnancy loss; alignment of light exposure, sleep timing, and activity with evolutionary expectations may support mitochondrial quality control (mitophagy rhythms), hormonal pulsatility (cortisol, melatonin, gonadotropins), and reduction of chronic pseudo-hypoxic or inflammatory signaling that further stresses mitochondria.
  • Strength: Dynamic resistance and aerobic training drive mitochondrial biogenesis signaling via PGC-1α in muscle and improve insulin sensitivity, and may support healthy testosterone dynamics in men, endothelial and endometrial function, and systemic metabolic reserve. Grip strength and functional metrics may serve as practical, indirect markers of systemic metabolic health.
  • ART as complementary adjunct: Surgery, hormonal stimulation, IUI, IVF/ICSI, and PGT retain and often gain value when deployed in a metabolically supported host. Optimized mitochondrial function may improve gamete yield and quality, reduce aneuploidy load, enhance embryo developmental competence, support endometrial receptivity, and improve tolerance of stimulation and pregnancy — hypothesis language, not a guarantee. Do not invent stimulation or luteal-support dosing from this page.
  • Levers worth studying for future pregnancies: Optimizing metabolic health before conception attempts may carry intergenerational benefits via improved parental gamete and in-utero metabolic milieu — population and counseling language, not a rebuke of necessary ART.

8. Continuity with the metabolic philosophy series

This reproductive hub is continuous with earlier essays. Fuel positions substrate architecture and nested symbionts as board foundations for high-ATP tissues. Thyroid names the HPT dashboard as often reporting systemic metabolic persistence rather than freestanding gland failure — relevant to reproductive hormonal rhythms without authorizing thyroid-med holidays. Obesity and Diabetes sit on insulin resistance, defended fat mass, and ROS terrain that dose-dependently worsen natural and ART fertility. Aging tracks mitochondrial biogenesis and mitophagy loss that maps directly onto the primordial oocyte pool. Signals names higher coordination (no invented peptide/HRT/GLP-1 protocols). GI holobiont fraying can amplify systemic inflammation and nutrient absorption that feed gonadal energetics. Cardiac and Eye remain high-watt sentinels of upstream bioenergetic coherence. Philosophy of Medicine names chronic disease as compensatory-mode lock-in. The same upstream logic — bioenergetic insufficiency, membrane and redox injury, selective pressure for low-fidelity states — unifies these domains.

  • Neurodevelopment — Autism ↔ Trisomy 21; gestational/germline engine adjacency.
  • Fuel — insulinogenic load; animal cofactor package; fermented MACs; NAD+/mitochondrial substrate adjacency; timing.
  • Thyroid — HPT dashboard of metabolic persistence; reproductive hormonal rhythm adjacency (med holidays).
  • Obesity · Diabetes — BMI, insulin resistance, metabolic syndrome as graded fertility and ART risk.
  • Aging — oocyte pool mtDNA fidelity, biogenesis, mitophagy loss with chronological age.
  • Signals — gonadotropin / sex-steroid coordination as higher-order effectors (peptide/HRT protocols).
  • GI — holobiont inflammation and absorption terrain feeding systemic reproductive energetics.
  • Cardiac · Eye — high-watt tissue sentinels of upstream engine status.
  • Philosophy of Medicine — disease as chronic compensatory mode; Good Doctor ethos; map ≠ terrain.

10. Limits of the claim

  • Working hypothesis. Not a randomized-trial verdict that mitochondrial-first strategies outperform guideline reproductive endocrinology, urology, or ART as monotherapy.
  • Does not deny true anatomic obstruction, hypogonadotropic hypogonadism, severe genetic lesions, endometriosis as entity, or the clinical utility of stimulation, ICSI, PGT, or donor gametes when indicated.
  • Ectopic pregnancy, OHSS, torsion, acute pelvic infection, and obstetric emergencies remain high-stakes; specialty care owns those clocks.
  • no peptide/HRT/GLP-1 protocols; no clinical dosing invention (including NAD+ precursor dosing) beyond hypothesis language.

11. Conclusion — restore the engine; keep ART as adjunct

Infertility is not merely a disorder of hormones, genes, or anatomy amenable only to downstream rescue. It is frequently enabled by cellular energy-handling failure that impairs high-ATP reproductive processes, elevates damaging ROS and DNA lesions, and permits or selects for lower-quality gametes and endometrial environments. The mitochondrial-metabolic hypothesis offers strong internal coherence through root-upstream causality from bioenergetic deficit to the observed clinical phenotypes. It rests on convergent cellular, preclinical (including NMN/NR fertility rescue data in animals, with one negative male mouse study, cited in the essays as evidence rather than recommendations; when a precursor is considered beyond diet, this hypothesis discusses low-dose IR NA — information, not a recommendation), and epidemiological evidence; is more parsimonious by reducing multiple categories and risk factors to one upstream defect; and is more comprehensive by unifying age-related decline, metabolic comorbidities, unexplained cases, gamete DNA integrity, and ART outcome gradients that conventional models treat piecewise.

This reframing does not negate endocrine evaluation, genetic testing, surgical correction, or ART; it contextualizes them within the bioenergetic state of the reproductive system and the selective dynamics that shape gamete and endometrial competence. Prevention and treatment become questions of restoring mitochondrial engine function and removing selective pressure for compromised states as a foundational strategy, with conventional tools as powerful but often downstream adjuncts. When mechanistic depth and interventional evidence converge on root restoration in addition to precision rescue, reproductive medicine moves closer to genuine transformation in both prevention and outcomes.

This is not a rejection of acute or specialty reproductive medicine when suffering or time-sensitive fertility windows demand it. It is an insistence that the long-term solution lies in restoring cellular energy competence rather than endlessly managing its fragmented failures on hormone and genetics dashboards alone. Feedback and collaborative refinement are welcomed. The goal remains understanding and restoring the engine. Offered as a working hypothesis, not clinical advice.

A working hypothesis, open to correction and revised as new evidence arrives. Last revised October 31, 2026.

References

  1. Cox CM, Thoma ME, Tchangalova N, et al., 2022. Infertility prevalence and the methods of estimation from 1990 to 2021: a systematic review and meta-analysis. Human Reproduction Open 2022(4):hoac051. doi:10.1093/hropen/hoac051
  2. Gelbaya TA, Potdar N, Jeve YB, et al., 2014. Definition and Epidemiology of Unexplained Infertility. Obstetrical & Gynecological Survey 69(2):109-115. doi:10.1097/OGX.0000000000000043
  3. Franasiak JM, Forman EJ, Hong KH, et al., 2014. The nature of aneuploidy with increasing age of the female partner: a review of 15,169 consecutive trophectoderm biopsies evaluated with comprehensive chromosomal screening. Fertility and Sterility 101(3):656-663.e1. doi:10.1016/j.fertnstert.2013.11.004
  4. Provost MP, Acharya KS, Acharya CR, et al., 2016. Pregnancy outcomes decline with increasing body mass index: analysis of 239,127 fresh autologous in vitro fertilization cycles from the 2008–2010 Society for Assisted Reproductive Technology registry. Fertility and Sterility 105(3):663-669. doi:10.1016/j.fertnstert.2015.11.008
  5. Campbell JM, Lane M, Owens JA, et al., 2015. Paternal obesity negatively affects male fertility and assisted reproduction outcomes: a systematic review and meta-analysis. Reproductive BioMedicine Online 31(5):593-604. doi:10.1016/j.rbmo.2015.07.012
  6. Cozzolino M, García-Velasco JA, Meseguer M, et al., 2021. Female obesity increases the risk of miscarriage of euploid embryos. Fertility and Sterility 115(6):1495-1502. doi:10.1016/j.fertnstert.2020.09.139
  7. May-Panloup P, Boucret L, Chao de la Barca JM, et al., 2016. Ovarian ageing: the role of mitochondria in oocytes and follicles. Human Reproduction Update 22(6):725-743. doi:10.1093/humupd/dmw028
  8. Boucret L, Bris C, Seegers V, et al., 2017. Deep sequencing shows that oocytes are not prone to accumulate mtDNA heteroplasmic mutations during ovarian ageing. Human Reproduction 32(10):2101-2109. doi:10.1093/humrep/dex268
  9. Igosheva N, Abramov AY, Poston L, et al., 2010. Maternal Diet-Induced Obesity Alters Mitochondrial Activity and Redox Status in Mouse Oocytes and Zygotes. PLoS ONE 5(4):e10074. doi:10.1371/journal.pone.0010074
  10. Koppers AJ, De Iuliis GN, Finnie JM, et al., 2008. Significance of Mitochondrial Reactive Oxygen Species in the Generation of Oxidative Stress in Spermatozoa. The Journal of Clinical Endocrinology & Metabolism 93(8):3199-3207. doi:10.1210/jc.2007-2616
  11. Sutovsky P, Van Leyen K, McCauley T, et al., 2004. Degradation of paternal mitochondria after fertilization: implications for heteroplasmy, assisted reproductive technologies and mtDNA inheritance. Reproductive BioMedicine Online 8(1):24-33. doi:10.1016/s1472-6483(10)60495-6
  12. Reynier P, May-Panloup P, Chrétien MF, et al., 2001. Mitochondrial DNA content affects the fertilizability of human oocytes. Molecular Human Reproduction 7(5):425-429. doi:10.1093/molehr/7.5.425
  13. El Shourbagy SH, Spikings EC, Freitas M, et al., 2006. Mitochondria directly influence fertilisation outcome in the pig. Reproduction 131(2):233-245. doi:10.1530/rep.1.00551
  14. Bertoldo MJ, Listijono DR, Ho WJ, et al., 2020. NAD+ Repletion Rescues Female Fertility during Reproductive Aging. Cell Reports 30(6):1670-1681.e7. doi:10.1016/j.celrep.2020.01.058
  15. Ben-Meir A, Burstein E, Borrego-Alvarez A, et al., 2015. Coenzyme Q10 restores oocyte mitochondrial function and fertility during reproductive aging. Aging Cell 14(5):887-895. doi:10.1111/acel.12368
  16. Robinson L, Gallos ID, Conner SJ, et al., 2012. The effect of sperm DNA fragmentation on miscarriage rates: a systematic review and meta-analysis. Human Reproduction 27(10):2908-2917. doi:10.1093/humrep/des261
  17. Diemer T, Allen JA, Hales KH, et al., 2003. Reactive Oxygen Disrupts Mitochondria in MA-10 Tumor Leydig Cells and Inhibits Steroidogenic Acute Regulatory (StAR) Protein and Steroidogenesis. Endocrinology 144(7):2882-2891. doi:10.1210/en.2002-0090
  18. Zhang J, Li F, Kuai D, et al., 2025. Analysis of mitochondrial DNA quantification in human blastocysts and assisted reproduction outcomes. Reproductive BioMedicine Online 50(5):104755. doi:10.1016/j.rbmo.2024.104755
  19. Mutsaerts MA, van Oers AM, Groen H, et al., 2016. Randomized Trial of a Lifestyle Program in Obese Infertile Women. New England Journal of Medicine 374(20):1942-1953. doi:10.1056/NEJMoa1505297
  20. Xu B, Guo N, Zhang XM, et al., 2015. Oocyte quality is decreased in women with minimal or mild endometriosis. Scientific Reports 5(1):10779. doi:10.1038/srep10779
  21. Paoli D, Gallo M, Rizzo F, et al., 2011. Mitochondrial membrane potential profile and its correlation with increasing sperm motility. Fertility and Sterility 95(7):2315-2319. doi:10.1016/j.fertnstert.2011.03.059
  22. Fariello RM, Pariz JR, Spaine DM, et al., 2012. Association between obesity and alteration of sperm DNA integrity and mitochondrial activity. BJU International 110(6):863-867. doi:10.1111/j.1464-410X.2011.10813.x
  23. Ramlau-Hansen CH, Thulstrup AM, Nohr EA, et al., 2007. Subfecundity in overweight and obese couples. Human Reproduction 22(6):1634-1637. doi:10.1093/humrep/dem035
  24. Sermondade N, Faure C, Fezeu L, et al., 2013. BMI in relation to sperm count: an updated systematic review and collaborative meta-analysis. Human Reproduction Update 19(3):221-231. doi:10.1093/humupd/dms050
  25. Best D, Avenell A, Bhattacharya S, 2017. How effective are weight-loss interventions for improving fertility in women and men who are overweight or obese? A systematic review and meta-analysis of the evidence. Human Reproduction Update 23(6):681-705. doi:10.1093/humupd/dmx027
  26. Das S, Chattopadhyay R, Ghosh S, et al., 2006. Reactive oxygen species level in follicular fluid--embryo quality marker in IVF? Human Reproduction 21(9):2403-2407. doi:10.1093/humrep/del156
  27. Miao Y, Cui Z, Gao Q, et al., 2020. Nicotinamide Mononucleotide Supplementation Reverses the Declining Quality of Maternally Aged Oocytes. Cell Reports 32(5):107987. doi:10.1016/j.celrep.2020.107987
  28. Feng YQ, Liu X, Zuo N, et al., 2024. NAD + precursors promote the restoration of spermatogenesis in busulfan-treated mice through inhibiting Sirt2-regulated ferroptosis. Theranostics 14(6):2622-2636. doi:10.7150/thno.92416
  29. Shen W, Luo X, Jin X, et al., 2025. Nicotinamide Riboside Supplementation Alleviates Heat Stress‐Induced Testicular Damage and Improves Semen Quality in Boars. Molecular Nutrition & Food Research 69(20):e70162. doi:10.1002/mnfr.70162
  30. Cantó C, Gerhart-Hines Z, Feige JN, et al., 2009. AMPK regulates energy expenditure by modulating NAD+ metabolism and SIRT1 activity. Nature 458(7241):1056-1060. doi:10.1038/nature07813
  31. Gomes AP, Price NL, Ling AJ, et al., 2013. Declining NAD+ Induces a Pseudohypoxic State Disrupting Nuclear-Mitochondrial Communication during Aging. Cell 155(7):1624-1638. doi:10.1016/j.cell.2013.11.037
  32. Luoma P, Melberg A, Rinne JO, et al., 2004. Parkinsonism, premature menopause, and mitochondrial DNA polymerase γ mutations: clinical and molecular genetic study. The Lancet 364(9437):875-882. doi:10.1016/S0140-6736(04)16983-3
  33. Xu Y, Nisenblat V, Lu C, et al., 2018. Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve: a randomized controlled trial. Reproductive Biology and Endocrinology 16(1):29. doi:10.1186/s12958-018-0343-0
  34. Stocker LJ, Macklon NS, Cheong YC, et al., 2014. Influence of shift work on early reproductive outcomes: a systematic review and meta-analysis. Obstetrics & Gynecology 124(1):99-110. doi:10.1097/AOG.0000000000000321
  35. Pilegaard H, Saltin B, Neufer PD, 2003. Exercise induces transient transcriptional activation of the PGC‐1α gene in human skeletal muscle. The Journal of Physiology 546(3):851-858. doi:10.1113/jphysiol.2002.034850

Related: Sage — Optimizing Medical and Traditional Childbirth (Wipeouts · Obstetrics and Gynecology).

See the notice at the top of this page. Working hypothesis, not medical advice.