Research
Hormonal
Obesity (BMI >30 kg/m2) is an independent risk factor for miscarriage and reduced success in assisted reproductive technologies (ART), regardless of PCOS status.
If you are planning pregnancy or undergoing fertility treatment, maintaining a healthy weight reduces your risk of miscarriage. Higher BMI is linked to lower success rates in IVF and higher miscarriage rates, independent of other conditions like PCOS.
GoodSupportsHIGH confidence
In pregnancies achieved by assisted reproduction treatment, we also showed a marked increase in the risk of miscarriage in overweight and obese women independent of PCOS (Wang et al., 2002).
Why this rating
Cited multiple studies showing consistent increased risk (OR 1.37-3.4) for miscarriage in obese women.
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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