The effect of cycle regimen used for endometrium preparation on the outcome of day 3 frozen embryo transfer cycle.

Three cycle regimens to prepare the patients' endometrium for day 3 frozen embryo transfer cycle have been evaluated (natural cycle, hormonally manipulated artificial programmed, and stimulated cycles). All three procedures were equally effective in terms of pregnancy outcome, although a higher probability of pregnancy was found in the natural cycle. Copyright 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.