Analysis of serum beta-human chorionic gonadotropin (beta-hCG) levels on standardized days after oocyte retrieval (OR) following single blastocyst transfer to predict pregnancy outcome after assisted reproductive technology.
Department of Obstetrics and Gynecology - Grosshadern University Hospital, Ludwig-Maximilians-University, Marchioninistrasse 15, 81377 Munich, Germany. Robert.Ochsenkuehn@med.uni-muenchen.de