Physiological Aspects of Female Fertility: Role of the Environment, Modern Lifestyle, and Genetics

Roger Hart, Roger J Hart
Physiological reviews · 2016 · vol. 96(3) , pp. 873–909 · doi:10.1152/physrev.00023.2015 · PMID:27252278 · W2418575920
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This review discusses how environmental factors, modern lifestyle choices like obesity and smoking, and genetics negatively impact female fertility, especially when childbearing is delayed.

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Abstract

Across the Western World there is an increasing trend to postpone childbearing. Consequently, the negative influence of age on oocyte quality may lead to a difficulty in conceiving for many couples. Furthermore, lifestyle factors may exacerbate a couple's difficulty in conceiving due mainly to the metabolic influence of obesity; however, the negative impacts of low peripheral body fat, excessive exercise, the increasing prevalence of sexually transmitted diseases, and smoking all have significant negative effects on fertility. Other factors that impede conception are the perceived increasing prevalence of the polycystic ovary syndrome, which is further exacerbated by obesity, and the presence of uterine fibroids and endometriosis (a progressive pelvic inflammatory disorder) which are more prevalent in older women. A tendency for an earlier sexual debut and to have more sexual partners has led to an increase in sexually transmitted diseases. In addition, there are several genetic influences that may limit the number of oocytes within the ovary; consequently, by postponing attempts at childbearing, a limitation of oocyte number may become evident, whereas in previous generations with earlier conception this potentially reduced reproductive life span did not manifest in infertility. Environmental influences on reproduction are under increasing scrutiny. Although firm evidence is lacking however, dioxin exposure may be linked to endometriosis, phthalate exposure may influence ovarian reserve, and bisphenol A may interfere with oocyte development and maturation. However, chemotherapy or radiotherapy is recognized to lead to ovarian damage and predispose the woman to ovarian failure.

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Condition tags

endometriosisinfertility

MeSH descriptors

Environment Fertility Life Style Reproduction Age Factors Female Fertility Humans Infertility, Female Infertility, Female Infertility, Female Maternal Age Obesity Obesity Polycystic Ovary Syndrome Polycystic Ovary Syndrome Reproduction

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References (100)

Cited by (17)

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