1. Abnormal endometrial development occurs during the luteal phase of nonsupplemented donor cycles treated with recombinant follicle-stimulating hormone and gonadotropin- releasing hormone antagonists 
Efstratios M Kolibianakis, MD, Claire Bourgain, MD, Peter Platteau, MD, Carola Albano, MD, Andre C Van Steirteghem, MD, PhD, Paul Devroey, MD, PhD 
Fertility and Sterility 
Volume 80, Issue 2, Pages (August 2003)
DOI: /S (03)

2. FIGURE 1
Difference between histologic and chronologic dating of endometrium at oocyte pick-up (open circles) and the mid-luteal phase (closed circles) after stimulation with recombinant FSH and GnRH antagonists and no luteal phase supplementation.
Kolibianakis. GnRH antagonists and luteal phase endometrium.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )