Scientists at UCSF have found that endometriosis — a painful chronic disease affecting 10% of women that often goes undiagnosed — often occurs alongside conditions like cancer, Crohn's disease, and migraine.

The research could improve how endometriosis is diagnosed and, ultimately, how it is treated; and it paints the sharpest portrait yet of a condition that is as mysterious as it is prevalent.

A new study has found that, among women with a high desire to avoid becoming pregnant, those who drank heavily had a 50% higher risk of becoming pregnant than those who drank moderately or not at all.  In contrast, participants who used cannabis were no more likely to have an undesired pregnancy than participants who did not use cannabis.