Endometriosis doubles odds for miscarriage in patients undergoing IVF or ICSI.

Objective: To identify and estimate the importance of risk factors on pregnancy loss until the end of the second trimester after clinical pregnancy was achieved by either in vitro fertilisation (IVF) or intra-cytoplasmic sperm injection (ICSI).

Study Design: Retrospective cohort study including 588 cycles with fresh embryo transfers and 150 cycles with frozen-thawed embryo transfers using logistic regression.

Results: The rate of miscarriages subsequent to a fresh embryo transfer was significantly increased by a diagnosis of endometriosis (p=0.