Genetic and chromosomal conditions Genes and chromosomes can sometimes change, causing serious health conditions and birth defects for your baby. Learn about these changes and testing for them.
Marfan syndrome Marfan syndrome is a birth defect that affects the body's connective tissue. Learn the signs and symptoms of Marfan syndrome and how it's treated.
Heroin and pregnancy Heroin is an illegal street drug derived from opioids. See what impact heroin has on your pregnancy and seek help if you're battling addiction.