Endometriosis and pregnancy loss: the importance of mitigating sources of bias.

We thank the investigators for an interesting letter in response to our study “Endometriosis is associated with pregnancy loss: a nationwide historical cohort study” ( 1 Boje A.D. Egerup P. Westergaard D. Bertelsen M.-L.M.F. Nyegaard M. Hartwell D. et al. Endometriosis is associated with pregnancy loss: a nationwide historical cohort study. Fertil Steril. 2023; 119: 826-835 Abstract Full Text Full Text PDF PubMed Scopus (3) Google Scholar ). Endometriosis and pregnancy loss: the importance of mitigating sources of biasFertility and SterilityVol. 120Issue 2PreviewWe read with great interest the study “Endometriosis is associated with pregnancy loss: a nationwide historical cohort study” (1). We agree that the sample size and the reliable Danish public health registry can be invaluable sources of new information on the association of endometriosis with pregnancy loss. However, it would be beneficial to share some insights that might challenge the strong statement that endometriosis is associated with pregnancy loss. Full-Text PDF