Abstract：Objective To investigate the factors affecting decreased ovarian reserve (DOR) among women of childbearing age, so as to provide insights into prevention of DOR. Methods Women with DOR at ages of 18 to 40 years that were admitted to Department of Gynecology, Ningbo Women and Children's Hospital during the period from January 2021 to June 2022 were recruited (DOR group), while healthy women at ages of 18 to 40 years during the same period served as normal controls. Participants' demographics, exercise, diet, previous medical history, childbearing history and menstruation were collected using questionnaire surveys. The follicle-stimulating hormone (FSH), luteinizing hormone (LH), anti-Müllerian hormone (AMH) and estradiol (E2) levels were tested. Factors affecting DOR were identified among women of childbearing age using a multivariable logistic regression model. Results There were 200 participants in the DOR group, with a median (interquartile range) age of 32 (9) years, and 200 participants in the normal group, with a median (interquartile range) age of 29 (12) years. Multivariable logistic regression analysis showed that underweight (OR=2.935, 95%CI: 1.374-6.269), overweight/obesity (OR=2.612, 95%CI: 1.335-5.065), high-oil-high-glucose-high-salt diet (OR=2.653, 95%CI: 1.616-4.357), menstrual disorder (OR=1.977, 95%CI: 1.284-3.041) and lack of exercise (OR=3.392, 95%CI: 2.052-5.606) were statistically correlated with the development of DOR among women of childbearing age. Conclusions Underweight, overweight/obesity, high-oil-high-glucose-high-salt diet, menstrual disorder and lack of exercise are factors affecting the development of DOR among women of childbearing age.
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