Sedentary Lifestyle, Ultra-Processed Diets, and Vitamin D Deficiency – the Epigenetic Drivers of Metabolic–Endocrine and Gut-Dysbiosis in PCOS Associated Female Infertility

Female infertility is increasingly being recognized as a complex metabolic–endocrine systems disorder arising from the intricate interplay among endocrine dysregulation, metabolic imbalance, genetic susceptibility, environmental exposure, and adverse lifestyle behaviour.^[1] Among the diverse etiological contributors, ovulatory dysfunction remains one of the predominant causes of infertility, accounting for nearly 85% of cases, and is strongly influenced by sedentary living and excessive consumption of calorie-dense ultra-processed foods.^[1,2] These factors profoundly impair fecundity, the intrinsic biological capacity for reproduction essential for maintaining reproductive homeostasis across populations.^[3] Declining fecundity is therefore increasingly associated not only with intrinsic reproductive abnormalities but also with altered behavioural, nutritional, and environmental exposures characteristics of modern lifestyles. ^[3]

Accumulating evidence indicates that most ovulatory disorders characterized by chronic anovulation, hyperandrogenism, and menstrual irregularities are closely associated with PCOS, one of the most prevalent metabolic–reproductive disorders affecting women of reproductive age.^[4,5] Beyond ovarian dysfunction, obesity, unhealthy dietary patterns, environmental toxicants, endocrine disruptors, and chronic metabolic stress adversely affect both the quantity and quality of oocytes, thereby compromising reproductive competence and fertility outcomes.^[6] Emerging studies further suggest that sedentary behaviour and inadequate dietary intake of vitamin D substantially contribute to vitamin D deficiency (VDD)-associated reproductive dysfunction and PCOS progression.^[7,8] According to the World Health Organization (WHO), nearly one in six individuals of reproductive age experiences infertility globally, with ovarian, tubal, uterine, endocrine, and metabolic abnormalities representing major contributing factors in women.^[6] In addition to metabolic and endocrine disturbances, genetic abnormalities such as monosomy X, chromosomal deletions, duplications, and imbalanced X-autosome rearrangements may result in premature depletion of primordial follicles and gonadal dysgenesis.^[9] Impaired granulosa cell signalling, abnormal follicular communication, and skewed X-chromosome inactivation (XCI) further contribute to accelerated germ cell depletion and primary ovarian insufficiency. ^[9]

Modern urbanization and technological dependence have dramatically increased physical inactivity worldwide, with nearly one-third of the global population failing to engage in adequate physical activity.^[10] Prolonged office work, excessive screen exposure, social media dependence, and lack of exercise-supportive environments have collectively promoted chronic sedentary behaviour.^[10-16] Such inactivity profoundly disrupts metabolic homeostasis by impairing protein transporter activity, altering lipid metabolism, reducing lipoprotein lipase activity, and dysregulating the insulin-like growth factor (IGF) axis, ultimately lowering insulin sensitivity and metabolic flexibility. ^[10] Sedentary behaviour additionally contributes to hypertension, endothelial dysfunction, altered sympathetic activity, and vascular impairment, all of which negatively influence reproductive physiology.^[10-13] Increasing evidence indicates that restricted skeletal muscle activity and chronic physical inactivity significantly reduce ovulatory efficiency, conception potential, and reproductive fitness.^[2,17-20] Conversely, moderate-to-vigorous physical activity improves cardiovascular health, insulin sensitivity, ovarian endocrine function, mental well-being, ovulation, and pregnancy outcomes.^[2,21-25] Exercise-mediated activation of endothelial nitric oxide synthase (eNOS) and adenosine monophosphate-activated protein kinase (AMPK) enhances vascular circulation, fatty acid oxidation, glucose utilization, and metabolic balance, thereby exerting protective effects on reproductive physiology and ovarian function. ^[9-16]

Parallel to sedentary behaviour, unhealthy dietary transition and excessive consumption of junk food and ultra-processed diets have emerged as major contributors to female reproductive dysfunction. Foods enriched with refined sugars, saturated fats, cholesterol, sodium, and artificial additives stimulate dopamine-mediated reward pathways, promoting addictive eating behaviour and long-term metabolic dysregulation.^[11-14] Chronic intake of high-glycaemic and energy-dense diets promotes obesity, insulin resistance, dyslipidemia, and endocrine imbalance while simultaneously depriving the body of essential micronutrients and antioxidant support. ^[11] Such dietary patterns are strongly associated with menstrual irregularities, dysmenorrhea, obesity, diabetes, and PCOS-associated infertility.^[12,13] Moreover, unhealthy dietary behaviour disrupts hypothalamic–pituitary–ovarian axis (HPOA) signalling and impairs hormonal synchronization essential for ovulation and reproductive cyclicity. ^[12,13] Nutritional imbalance, fasting, and inadequate intake of proteins and essential amino acids further dysregulate nutrient-sensing pathways including forkhead box O (FOXO) transcription factors, which play critical roles in oxidative stress regulation, metabolic adaptation, ovarian aging, and reproductive longevity. ^[14,26-28]

Collectively, the growing interaction among sedentary lifestyle, unhealthy dietary practices, metabolic dysfunction, vitamin D deficiency, chronic inflammation, and PCOS biology strongly supports the concept that female infertility should be interpreted within a broader metabolic–endocrine systems framework rather than as an isolated ovarian disorder. These interconnected molecular and lifestyle-associated disturbances highlight the urgent need for integrated preventive, nutritional, metabolic, and lifestyle-based therapeutic strategies to improve reproductive health and fertility outcomes in women.

Rationale and Scopes of the Review

Despite growing evidence on the role of lifestyle factors in reproductive health, there remains a lacuna of guidelines, and personalised-tailored recommendations for physical activity and dietary interventions exist according to the baseline fitness level of patients, health status, and infertility-related diagnosis for the management and mitigation of infertility. Moreover, existing studies often focus on isolated aspects rather than providing an integrative understanding of molecular, physiological, and clinical interactions. These gaps hinder healthcare providers from offering clear, evidence-based recommendations on optimal exercise intensity, frequency, and dietary patterns to maximize the conception rates. Therefore, this review aims to comprehensively analyse the impact of sedentary lifestyle and junk food consumption on female fertility, highlighting mechanistic pathways, clinical implications, and potential therapeutic strategies by highlighting the intricacy of VDD-PCOS crosstalk from our previous study outcomes. 

Methodology

Literature search strategy

A systematic and comprehensive literature search was conducted across major scientific databases, including PubMed, ScienceDirect, and PubMed Central (PMC), to ensure broad coverage of relevant studies. The search strategy was designed to capture both experimental and observational research, as well as review articles, thereby providing a multidimensional understanding of the topic. Emphasis was placed on peer-reviewed publications to ensure the reliability and scientific validity of the included data.

Keywords and time frame

The search incorporated specific keywords such as “female fertility,” “fecundity,” “sedentary lifestyle,” “junk food,” and “reproductive health,” combined using Boolean operators to refine results. The time frame spanned from January 2003 to March 2026, allowing inclusion of both foundational studies and recent advancements. This extensive temporal coverage facilitated the identification of evolving trends and emerging concepts in reproductive health research.

Study selection

Studies were selected based on relevance to the topic, methodological rigor, and clarity of outcomes. Only articles published in English were included to maintain consistency in interpretation. Both human and mechanistic studies were considered to integrate clinical observations with molecular insights. This approach ensured a balanced and comprehensive synthesis of evidence (Figure 1).

 

Figure 1: Overview of systematic literature search and study selection process.

Panel 1— Study types included: The search intentionally targeted multiple study designs narrated in English: experimental (in vitro, animal), observational (cohort, case‑control, cross‑sectional), and review articles. Emphasis on peer‑reviewed publications increased confidence in methodological quality and reliability of reported findings. Both human clinical studies and mechanistic investigations were included to integrate clinical outcomes with underlying biological mechanisms.

At the molecular level, junk food consumption profoundly alters nutrient-sensing and metabolic regulatory pathways involved in reproductive physiology. Excessive caloric intake and poor-quality diet dysregulate AMPK, mechanistic target of rapamycin (mTOR), forkhead box O (FOXO), and fibroblast growth factor 21 (FGF21) signalling pathways, all of which coordinate cellular metabolism, oxidative stress responses, aging, and ovarian function. ^[73-78] AMPK normally functions as a cellular energy sensor that promotes metabolic balance and preserves cellular integrity under low-energy conditions, whereas excessive nutrient availability and overactivation of mTOR signaling promote metabolic imbalance and ovarian dysfunction. ^[76-78] FOXO transcription factors play critical roles in oxidative stress resistance, apoptosis regulation, and maintenance of oocyte quality, while FGF21 contributes to systemic energy homeostasis and reproductive adaptation during metabolic stress.^{[57-62,73-78]} Dysregulation of these interconnected pathways disrupts the balance between metabolism and reproduction, thereby accelerating reproductive decline and infertility progression.^[76-78] Chronic intake of ultra-processed food also promotes oxidative stress and systemic inflammation through accumulation of advanced glycation end-products (AGEs), lipid overload, and inflammatory activation.^{[66-72,79-82]} Increased production of ROS damages ovarian tissues, impairs oocyte quality, and compromises follicular microenvironment integrity.^[34,35] Simultaneously, visceral adiposity associated with unhealthy dietary behaviour acts as an endocrine organ that secretes pro-inflammatory cytokines such as TNF-α, IL-6, and resistin, which interfere with insulin receptor signalling and ovarian steroidogenesis.^{[34,35,83,84]} This chronic inflammatory state aggravates endocrine dysfunction, hyperandrogenism, and ovulatory failure while reducing implantation success and fertility potential (Figure 2). ^{[34,35,83,84]}

Figure 2: Schematic representation of the effect of sedentary lifestyle, junk food on molecular pathways linking PCOS, endometriosis, and infertility. Lifestyle and metabolic risk factors: sedentary lifestyle, high intake of junk food, and vitamin D deficiency are shown as the determinants. These factors promote systemic metabolic dysfunction, including insulin resistance and obesity. The metabolic consequences drive nutrient-sensing and stress-response nodes of altered AMPK activity and altered FOXO transcription factor signaling. The altered AMPK/FOXO pathways lead to PCOS manifestations and persistence of endometriosis. PCOS=polycystic ovary syndrome, AMPK = adenosine monophosphate-activated protein kinase, FOXO=Forkhead box transcription factors. ↓= decrease, ↑=increase, +=stimulation

Unhealthy foods - Gut Dysbiosis and reproductive pathophysiology

Emerging evidence identifies gut microbiota dysbiosis as a major mechanistic link between unhealthy dietary behaviour, metabolic dysfunction, chronic inflammation, and female infertility.^[79-82] Frequent consumption of junk food, fast food, and ultra-processed diets rich in saturated fats, refined sugars, artificial additives, and low-fiber content profoundly alters gut microbial diversity and composition, thereby disrupting intestinal metabolic homeostasis.^[79-82] Such dietary patterns reduce beneficial microbial populations involved in short-chain fatty acid (SCFA) production while simultaneously promoting the proliferation of pro-inflammatory gram-negative bacteria. This microbial imbalance compromises intestinal barrier integrity by disrupting tight junction proteins, leading to increased intestinal permeability or “leaky gut” phenomenon.^[79-82] Enhanced intestinal permeability facilitates translocation of lipopolysaccharides and other endotoxins into systemic circulation, resulting in metabolic endotoxemia and activation of chronic low-grade inflammatory pathways.^[79-82] LPS-mediated activation of toll-like receptor-4 (TLR4) signalling stimulates nuclear factor kappa B (NF-κB)-dependent inflammatory cascades, increasing production of pro-inflammatory cytokines such as TNF-α, IL-6, and interleukin-1β (IL-1β).^[79-82] These inflammatory mediators interfere with insulin receptor signalling pathways, aggravating insulin resistance and hyperinsulinemia, which are central pathogenic mechanisms underlying PCOS-associated infertility and ovulatory dysfunction.^[79-82] Hyperinsulinemia further stimulates ovarian theca cells to enhance androgen biosynthesis while suppressing hepatic SHBG synthesis, thereby increasing free androgen concentrations and promoting follicular arrest and chronic anovulation. Gut dysbiosis additionally affects reproductive endocrinology through modulation of estrogen metabolism and enterohepatic circulation. Altered microbial β-glucuronidase activity influences estrogen deconjugation and reabsorption, thereby disrupting circulating estrogen levels and hormonal homeostasis essential for folliculogenesis, ovulation, and endometrial receptivity.^[79-82] Disturbed gut microbial composition may also impair synthesis of essential metabolites involved in neurotransmitter regulation, including serotonin, dopamine, and gamma-aminobutyric acid (GABA), thereby indirectly influencing HPOA regulation and GnRH pulsatility.^[79-82] At the ovarian level, chronic systemic inflammation and oxidative stress associated with dysbiosis compromise follicular microenvironment integrity and oocyte competence. Increased ROS generation impairs mitochondrial function within ovarian cells, reducing ATP production required for oocyte maturation and embryonic development.^[79-82] Inflammatory cytokines additionally disrupt granulosa cell steroidogenesis and follicular signalling pathways, thereby impairing ovulation and implantation potential. Dysbiosis-associated metabolic disturbances also alter adipokine secretion, particularly leptin and adiponectin signalling, further aggravating endocrine imbalance and reproductive dysfunction. Another critical aspect involves the role of endocrine-disrupting chemicals, food preservatives, emulsifiers, artificial sweeteners, and trans fats commonly present in ultra-processed foods.^[79-83] These compounds may directly interfere with hormone receptor signalling, steroidogenic enzyme activity, and epigenetic regulation of reproductive genes. Experimental studies suggest that such dietary components influence DNA methylation, histone modification, and microRNA expression associated with metabolic regulation, inflammation, and ovarian physiology.^[79-82] Furthermore, disturbed circadian eating behaviour frequently associated with fast food consumption disrupts hormonal synchronization involving LH, cortisol, and melatonin secretion, thereby destabilizing menstrual cyclicity and reproductive endocrine regulation. ^{[69,70,72,84]}

Collectively, current molecular and experimental evidence strongly supports gut dysbiosis as a central mediator linking unhealthy dietary patterns with infertility, PCOS progression, chronic inflammation, oxidative stress, and endocrine dysfunction. These findings highlight the potential therapeutic significance of microbiota-targeted nutritional interventions, dietary modification, and restoration of intestinal metabolic homeostasis in improving female reproductive health and fertility outcomes. ^[79-82,85]

Experimental and clinical evidence linking unhealthy diets with infertility

Experimental, epidemiological, and clinical studies consistently demonstrate a strong association between unhealthy dietary patterns and adverse reproductive outcomes. ^{[12,18,21-23,28,66-72,86]} Observational studies indicate that women with frequent consumption of junk food and fast food exhibit higher prevalence of menstrual irregularities, dysmenorrhea, oligomenorrhea, premenstrual syndrome, obesity, and PCOS-associated infertility.^{[12,18,21-23,28,87]} Diets rich in refined carbohydrates and trans fats have also been associated with reduced ovulatory fertility and impaired endocrine balance.^[87-90] Clinical evidence further suggests that regular intake of ultra-processed foods increases the risk of insulin resistance, dyslipidemia, obesity, and metabolic syndrome, all of which adversely affect ovarian physiology and reproductive competence.^[83,84] Elevated triglycerides, reduced high-density lipoprotein (HDL) levels, and ectopic lipid accumulation impair endothelial function and ovarian blood flow, thereby negatively influencing follicular development, fertilization, and implantation processes. ^[34,35,91] Studies additionally report that women consuming fast food more than once daily experience significantly higher infertility risk and poorer reproductive outcomes compared with individuals following balanced dietary practices. ^[66-72] Epidemiological studies in adolescents and young women indicate that excessive junk food consumption may contribute to earlier onset of menarche, which is associated with long-term endocrine and metabolic consequences including increased risk of PCOS and infertility later in life.^{[12,18,21-23,28]} Experimental studies also reveal that diets high in saturated fats and refined sugars alter prostaglandin metabolism, particularly increasing pro-inflammatory prostaglandin F2α (PGF2α), thereby contributing to uterine hypercontractility, dysmenorrhea, and menstrual disturbances.^[69,85] Importantly, several interventional and nutritional studies demonstrate that dietary modification can improve reproductive outcomes by restoring metabolic and endocrine homeostasis.^[66-72] Balanced diets enriched with antioxidants, fiber, omega-3 fatty acids, vitamins, and micronutrients improve insulin sensitivity, reduce oxidative stress, and support ovarian function.^[86,87,92] Dietary restriction and nutritional optimization further activate protective metabolic pathways involving FOXO and AMPK signalling, thereby improving mitochondrial function, reducing inflammatory burden, and preserving ovarian reserve. ^[75,76,88]

However, variability in study design, dietary assessment methods, and population characteristics limits direct comparison across studies.^[86,87,93] Despite these limitations, current evidence strongly supports the concept that junk food and ultra-processed dietary patterns represent significant modifiable risk factors for female reproductive dysfunction. Collectively, the available experimental and clinical findings reinforce the importance of dietary regulation, nutritional awareness, and lifestyle-based interventions as central preventive and therapeutic strategies for improving fertility outcomes and reproductive health in women. ^{[12,18,21-23,28,86,87]}

PCOS- PMOS: a nexus of lifestyle–genetic interaction

The multidimensional metabolic, endocrine, inflammatory, and reproductive disturbances associated with PCOS strongly support the recently proposed nomenclature shift toward “Polyendocrine Metabolic Ovarian Syndrome (PMOS),” which more accurately reflects the systemic nature of the disorder rather than limiting it to ovarian morphology alone. The findings discussed in this review demonstrate that insulin resistance, chronic inflammation, vitamin D deficiency, adipokine imbalance, and lifestyle-associated metabolic dysfunction collectively contribute to reproductive impairment, emphasizing the broader metabolic complexity underlying the syndrome. Furthermore, the beneficial impact of healthy dietary practices and regular physical activity on endocrine, metabolic, and reproductive homeostasis reinforces the concept that PMOS is fundamentally a multisystem metabolic–reproductive disorder influenced by modifiable lifestyle factors.^{[18,19,21-29,38-65,94-96]} Exercise-induced activation of AMPK promotes fatty acid oxidation, improves glucose uptake through enhanced GLUT4 expression, and restores metabolic balance. These changes contribute to normalization of ovarian steroidogenesis, improved follicular maturation, and restoration of ovulatory cycles. Exercise additionally stimulates eNOS activity, improving vascular function and blood circulation to reproductive tissues. Enhanced ovarian perfusion supports follicular development and endometrial receptivity, thereby improving implantation potential and pregnancy outcomes. At the molecular level, physical activity promotes mitochondrial biogenesis through activation of PGC-1α, enhancing oxidative metabolism and reducing ROS accumulation.^{[18,19,21-29,38-65,94-96]} Exercise also suppresses inflammatory pathways by reducing TNF-α and IL-6 levels while increasing anti-inflammatory mediators. Improved insulin receptor phosphorylation and activation of PI3K/Akt pathways further restore insulin signalling and ovarian function. An equally important aspect highlighted in this review is the neuroendocrine and psychological benefit of exercise. Physical activity modulates HPAA activity, reduces cortisol levels, improves serotonergic and dopaminergic signalling, and enhances release of endorphins and BDNF. These neuropsychological improvements reduce infertility-associated stress and indirectly restore reproductive endocrine balance. ^{[18,19,21-29,38-65,94-96]}

Evidence summarized in this review consistently indicates that moderate-intensity exercise improves ovulation rates, menstrual regularity, hormonal balance, and pregnancy outcomes, particularly in overweight and PCOS populations. However, the review also acknowledges that excessive exercise and severe caloric restriction may induce hypothalamic suppression and anovulation, emphasizing the need for balanced and individualized physical activity recommendations. Healthy dietary habits similarly exert protective effects on reproductive physiology by restoring metabolic and endocrine homeostasis. Nutrient-dense and balanced diets improve insulin sensitivity, reduce inflammation, and provide essential micronutrients required for oocyte maturation, hormonal synthesis, antioxidant defense, and reproductive tissue integrity. Dietary interventions modulate nutrient-sensing pathways including FOXO, mTOR, and AMPK, thereby promoting mitochondrial function, cellular repair, oxidative stress resistance, and preservation of ovarian reserve. Caloric optimization and balanced nutrition improve metabolic signalling and create a favourable endocrine environment for ovulation, fertilization, and implantation. The review further emphasizes that combined lifestyle interventions involving structured exercise, healthy dietary modification, micronutrient optimization, and weight regulation yield superior reproductive outcomes compared with isolated interventions. Such integrated approaches improve insulin sensitivity, reduce hyperandrogenism, normalize menstrual cyclicity, and enhance fertility potential. ^{[56-65,73-78,88,94-96]}

Future perspective: from association to precision-based reproductive intervention

The evidence synthesized throughout this review strongly establishes female infertility as a systems-level metabolic–endocrine disorder arising from continuous interactions among genetic susceptibility, endocrine imbalance, metabolic dysfunction, micronutrient deficiency, environmental exposure, and lifestyle behavior. Among the major contributors, PCOS/PMOS emerges as one of the most significant infertility-associated conditions characterized by insulin resistance, hyperandrogenism, chronic inflammation, oxidative stress, mitochondrial dysfunction, and impaired folliculogenesis.^{[12,18-29,34,35,73-78,83,84,86,87]} The interconnected influence of junk food consumption, sedentary lifestyle, gut dysbiosis, and vitamin D deficiency further highlights that reproductive dysfunction cannot be interpreted solely within the boundaries of ovarian pathology, but rather as a multisystem metabolic disorder profoundly shaped by modifiable environmental and nutritional factors. The future of reproductive medicine must therefore advance beyond associative observations toward mechanistically driven, precision-based, and translational frameworks. Large-scale longitudinal and multi-omics studies integrating genomics, epigenomics, metabolomics, transcriptomics, and microbiome profiling are urgently required to decode the complex molecular networks linking lifestyle-associated metabolic dysfunction with infertility progression. Such approaches may facilitate identification of predictive biomarkers for early detection, risk stratification, disease progression, and individualized therapeutic targeting. ^{[12,18-29,34,35,73-78,83,84,86,87]}

Future research should particularly prioritize gene–environment and gene–nutrient interaction models involving vitamin D signalling, VDR polymorphisms, insulin resistance pathways, oxidative stress regulators, inflammatory mediators, and nutrient-sensing networks such as AMPK, mTOR, FOXO, and PI3K/Akt pathways. These mechanistic insights will strengthen the development of nutrigenomics-based and lifestyle-oriented precision medicine strategies for infertility and PCOS/PMOS management. Equally important is the need for well-designed randomized controlled trials evaluating integrated lifestyle interventions combining structured physical activity, dietary optimization, micronutrient supplementation, circadian regulation, and behavioural therapy. Considering the marked heterogeneity across metabolic phenotypes, genetic backgrounds, and socio-cultural environments, future reproductive healthcare must increasingly adopt individualized and personalized intervention models rather than uniform therapeutic protocols.^{[12,18-29,34,35,73-78,83,84,86,87]}

Emerging technologies including artificial intelligence-driven predictive analytics, wearable metabolic monitoring systems, and digital reproductive health platforms should also be incorporated into fertility management to enable continuous lifestyle surveillance and real-time therapeutic modulation. From a broader public health perspective, infertility should be recognized as a lifestyle-linked non-communicable disorder requiring preventive policy-level interventions emphasizing nutritional awareness, physical activity, environmental safety, early metabolic screening, and reproductive health education. Such integrative and preventive strategies may substantially reduce the growing global burden of infertility while improving long-term reproductive and metabolic health outcomes in women. ^{[43-51,38-42,52-65,90-96]}

CONCLUSION

Female infertility can no longer be viewed through a fragmented lens of isolated endocrine or structural abnormalities; rather, it must be recognized as a systems-level disorder governed by the dynamic interplay of genetic, molecular, metabolic, and lifestyle determinants. The present synthesis unequivocally establishes that sedentary behaviour and unhealthy dietary patterns are not peripheral influences but central drivers of reproductive dysfunction, operating through IR, chronic inflammation, oxidative stress, and endocrine disruption. These pathways converge on critical regulatory axes—including the HPOA, adipokine signalling, and nutrient-sensing networks—ultimately impairing ovulation, oocyte quality, and implantation potential. Importantly, the interaction between intrinsic factors such as chromosomal integrity, gene regulation, and ovarian reserve with extrinsic modulators like physical inactivity and nutrient imbalance defines the phenotypic expression and severity of infertility. Conditions such as PCOS exemplify this convergence, where metabolic dysregulation, micronutrient deficiencies (notably vitamin D), and genetic susceptibility collectively shape reproductive outcomes. Thus, infertility should be redefined not merely as a reproductive disorder but as a metabolic–endocrine continuum influenced by modifiable lifestyle behaviours. This paradigm mandates a decisive shift in both clinical and research approaches—from reactive treatment strategies to preventive, integrative, and systems-based interventions. Lifestyle optimization is not an adjunct but a primary therapeutic axis, capable of restoring physiological equilibrium and enhancing reproductive potential. The evidence presented herein compels clinicians, researchers, and public health systems to reposition lifestyle as a cornerstone in the management and prevention of female infertility.

In essence, the next frontier lies in transforming our understanding of infertility from a condition to be treated into a biological state to be predicted, prevented, and precisely modulated.

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