Observational study links prenatal paracetamol exposure to altered reproductive development in daughters

A recent observational study conducted in Denmark has found that prenatal exposure to paracetamol may be linked to altered reproductive development in daughters. Researchers at Copenhagen University Hospital-Rigshospitalet examined 3,425 healthy pregnant women and their babies, with 685 women enrolled during the first trimester of pregnancy.

The babies' ovarian function was evaluated when they were 3 months old. The study revealed that daughters exposed to paracetamol during fetal life had smaller ovaries, fewer ovarian follicles, and smaller uteruses compared to those not exposed. They also had lower levels of Anti-Müllerian hormone, which indicates a reduced ovarian egg reserve.

Dr. Margit Bistrup Fischer, who led the study, noted that while the findings are consistent with previous animal studies, they do not establish a direct cause-and-effect relationship. She emphasized that women should not be alarmed by the results and that further long-term investigations are needed to confirm the findings. The researchers stressed that the study does not evaluate whether paracetamol causes reproductive problems or affects future fertility or age at menopause.

They also highlighted that the mothers in the study took relatively low levels of paracetamol, and none exceeded the recommended daily maximum dose. The study's findings suggest that women who use paracetamol during pregnancy should engage in informed discussions with their healthcare professionals about pain management options, considering alternative approaches when appropriate.