Avoid marijuana while pregnant urges new health advice

Despite the growing trend for marijuana use in the US, new advice warns women against smoking marijuana while pregnant, as the drug could affect the brain of the developing fetus.According to data from the Centers for Disease Control and Prevention's National Vital Statistics Reports, more than one in five US births now occur in states where marijuana is legal, following moves by many states to legalize medical use for adults, as well as decriminalize or legalize recreational use.