Dr. Isaac Kligman is a Professor of Obstetrics and Gynecology and Reproductive Medicine at the Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine (CRM) at Weill Cornell Medical College. Board certified in both Obstetrics and Gynecology and Reproductive Endocrinology and Infertility, he is an internationally renowned fertility specialist.Dr Kligman provides fertility preservation services for women who want to cryopreserve (freeze) their eggs and desire to achieve a pregnancy later in their reproductive life. With the refinements in this technology such as oocyte (egg) vitrification, this procedure has become widespread and a good alternative to overcome the impact of aging on a woman's ovary. He also treats patients with a wide range of reproductive and infertility disorders. He helps patients with fertility issues become pregnant using the most sophisticated assisted reproduction techniques, including in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI).