The effect of endometriosis on live birth rate and other reproductive outcomes in ART cycles: a cohort study.

Study Question: What is the effect of endometriosis compared to unexplained subfertility on live birth rate in women undergoing IVF and embryo transfer (ET)?

Summary Answer: Endometriosis decreases live birth rate in women undergoing IVF-ET treatment, particularly with increasing severity of the disease.

What Is Known Already: Endometriosis affects up to 50% of women seeking fertility treatment and is known to reduce fecundity. There remains a debate as to effects of endometriosis on the outcomes of IVF treatment, with live birth being a secondary outcome or not reported in most studies.