Give Up Alcohol
Some studies say it's fine to have a few drinks during pregnancy, but others have shown that heavy drinkers have a harder time conceiving than women who drink lightly or abstain. Ultimately, "we don't actually know what a safe level of alcohol is in pregnancy or exactly when during pregnancy alcohol might have its most severe effects," says Myra J Wick, M.D., medical co-editor of Mayo Clinic Guide to a Healthy Pregnancy. "If a patient is actively trying to conceive, I recommend that she not drink at all," she adds. The same goes for marijuana and other illicit drugs. If you wouldn't give it directly to your baby, make sure it's out of your system before (and during) pregnancy so that you don't pass it along.