The American College of Obstetricians and Gynecologists recommends that obstetrician-gynecologists counsel women against using marijuana while trying to get pregnant, during pregnancy and while they are breastfeeding. Women report using cannabis to treat severe nausea, but there is no research confirming this is safe. In fact, animal studies have shown moderate concentrations of THC to mothers while pregnant or nursing, could have long-lasting effects on the baby- including such health issues as increased stress responsivity and abnormal patterns of social interactions. Animal studies actually show learning deficits in prenatally exposed individuals.
Human research has already shown that some children born to mothers who used cannabis during pregnancy displayed altered response to visual stimuli, increased trembling, and a high pitched cry – all likely indications of problems with neurological development.
One study indicates that even moderate amounts of THC do find their way into breast milk – because the baby’s brain is still forming, THC consumed in breast milk could affect brain development.
Preventative Medicine reports some women reported a perceived lack of communication from their health care professionals about the risks of cannabis as safe for use during pregnancy.
News/ Medical Life Sciences: https://www.news-medical.net/news/20190708/Cannabis-use-during-pregnancy-may-cause-premature-birth.aspx