Pregravid contraceptive use and fecundability: prospective cohort study.

Objective: To evaluate the association between pregravid use of a variety of contraceptive methods and subsequent fecundability.

Design: Prospective cohort study.

Setting: Denmark and North America, 2007-19.

Association Between Male Use of Pain Medication and Fecundability.

Administration of pain relievers has been associated with both lower and higher risks of adverse reproductive outcomes in animals. In the sole investigation of male pain-reliever use and human fertility carried out to date, Smarr et al. (Hum Reprod.