This document discusses various medical conditions that can affect pregnancy including diabetes, cardiac disease, hypertension, thyroid disorders, adolescent pregnancy, pregnancy over 35, and multiple gestations. It covers etiology, effects on mother and fetus, screening and testing, and nursing considerations for management during antepartum, intrapartum, and postpartum periods. Fetal risks associated with these conditions include congenital anomalies, restricted growth, prematurity, and complications at birth.

1. Diabetes

30. Twin placenta

31. Twin Placentas

34. Twin Presentations

36. Twin-Twin Transfusion