As a physician and mother, I am very familiar with the caution with which most pregnant women ingest anything, and the anxiety caused by an inadvertent exposure to a substance that could harm the baby.

A great resource for pregnant or breastfeeding women and their care providers is Motherisk, a program at The Hospital for Sick Children in Toronto, Ontario that provides evidence-based information on the risk to the fetus or infant of maternal exposure to drugs, chemicals, diseases, radiation and environmental agents.

There's an extensive section on morning sickness, pharmaceutical drugs and occupational/environmental exposures in pregnancy.

Whether you're wondering about taking an aspirin while pregnant, the risks of lead exposure, breastfeeding with silicone implants, or how long to wait after a glass of wine to nurse your baby, Motherisk covers it.