Wayne R. Cohen, M.D., Ph.D is chairman of Obstetrics and Gynecology at Jamaica Hospital NY, visiting professor Dept. of Ob--Gyn and Women’s Health at Albert Einstein Bronx, NY. He was the Obstetrician and Gynecology-in-Chief Sinai hospital of Baltimore Maryland. He is author of Complications in Pregnancy, published by Lippincott Williams & Wilkins 2000 (the 5th edition).