Perelman and Claudia Cohen Center for Reproductive Medicine of Weill Cornell Medical College. A board-certified obstetrician/gynecologist and reproductive endocrinologist, her specialties include in vitro fertilization, ovulation induction and fertility preservation (egg freezing). She has a special interest in reproductive surgery, and is a noted expert on the surgical management of Müllerian anomalies. Dr. Pfeifer is regularly featured in Castle Connolly'sTop Doctors list, among other regional and national best-physician lists.