Rh disease RH factor is a protein on some people's red blood cells. Learn how RH disease affects your baby and how to prevent it.
Prescription opioids during pregnancy Prescription opioids are painkillers that include codeine, morphine and oxycodone. Taking opioids during pregnancy can cause serious problems for your baby.
Smoking during pregnancy Smoking during pregnancy can cause problems like premature birth and birth defects. If you need help to quit smoking, tell your health care provider.