Microtia and anotia Microtia and anotia are birth defects of the ear. Learn about risk factors for microtia.
Placenta previa Placenta previa is when your placenta lays lows in the uterus. Learn about placentia previa's causes and treatment.
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.