Research

Hormonal

Modest weight loss (5-10% of initial body weight) through caloric restriction and/or exercise restores ovulation and improves pregnancy rates in overweight/obese women with PCOS or general infertility.

If you are overweight or obese and struggling with fertility, losing just 5-10% of your current body weight through diet and exercise can significantly improve your hormone levels and restore natural ovulation. This is often more effective than jumping straight to high-dose fertility drugs.

GoodSupportsHIGH confidence
Modest weight losses of ~10% in obese women have been demonstrated to be effective in improving hormonal profiles, menstrual regularity, ovulation, and pregnancy rates... Interventions over as little as 4 weeks with weight losses of 5–10% of initial body weight can reduce hyperandrogenism and circulating insulin.
Robert J. Norman · Human Reproduction Update · 2004

Why this rating

The paper is a review citing multiple observational and interventional studies showing consistent benefits, though specific RCT data for dose-response is limited in the text.

Source

Improving reproductive performance in overweight/obese women with effective weight management

Robert J. Norman · Human Reproduction Update · 2004

DOI 10.1093/humupd/dmh018

narrative_reviewCited 382×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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