Zika virus and pregnancy Zika infection during pregnancy can cause a birth defect called microcephaly and other brain problems. Learn how to protect yourself from Zika.
Congenital syphilis Congenital syphilis is when a baby is born with syphilis, passed by the mother during pregnancy. Seek treatment if they're diagnosed after birth.
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.