Tylenol use during pregnancy may be linked to reduced reproductive development in daughters.

Researchers reported that girls exposed to Tylenol, also known as acetaminophen, before birth had differences in reproductive-organ development, including smaller ovaries and uteruses at about three months of age. That supports the claim’s cautious wording that use during pregnancy “may be linked” to reduced reproductive development in daughters.ln24international.comln24international.comTylenol Use In Pregnancy May Be Linked To Reproductive Organ Changes In...economictimes.indiatimes.comeconomictimes.indiatimes.comTylenol use in pregnancy may be linked with uterus, ovary changes in daughters+2 more

The evidence does not show that Tylenol caused the observed differences. Reuters reports that the researchers emphasized the study could not establish causation and did not demonstrate effects on later fertility or other reproductive outcomes. The available reports also do not establish whether the differences persist as the children grow, or whether they have any clinical significance.yahoo.comyahoo.comTylenol use in pregnancy may be linked with uterus, ovary changes in daughtersenglish.aawsat.comenglish.aawsat.comTylenol Use in Pregnancy May Be Linked with Uterus, Ovary Changes in Daughters+2 more

The September 2025 Snopes article concerns a related but different debate about Tylenol and autism, so it does not directly verify the reproductive-development finding. Most of the September 2026 sources repeat Reuters’ account rather than provide the underlying study, which limits independent assessment of the research design and results. The best-supported conclusion is therefore a preliminary association involving measured organ size in infants, not proof of harm or future infertility.snopes.comsnopes.comDoes Tylenol use during pregnancy cause autism? Here's what science sayseconomictimes.indiatimes.comeconomictimes.indiatimes.comTylenol use in pregnancy may be linked with uterus, ovary changes in daughters+2 more