This INTERACTIVE lesson discusses problem pregnancies caused by heredity, environment, or both. Concepts include birth defects, preventions/precautions, ultrasounds, amniocentesis, chorionic villus sampling, placenta conditions, stillbirth, and miscarriage. Students need to understand that not all problem pregnancies result in negative outcomes. This lesson is not meant to scare the students, just make them more knowledgeable about pregnancy and the things they can do to increase their chances