Mind-altering breast milk? New pot study poses that question

CHICAGO — Marijuana's main mind-altering ingredient was detected in nursing mothers' breast milk in a small study that comes amid evidence that more U.S. women are using pot during pregnancy and afterward.Experts say the ingredient, THC, has chemical properties that could allow it to disrupt brain development and potentially cause harm, although solid evidence of that is lacking.The new study involved 50 nursing mothers who were using pot and provided breast milk samples to researchers at