The primary objective of this study is to evaluate the clinical pregnancy rate of micronized progesterone (Endometrin, Ferring Pharmaceuticals) compared to progesterone in oil injections in in-vitro fertilization (IVF) donor egg recipients. The secondary objective is to evaluate the effectiveness of freezing/vitrification of donor eggs. Effectiveness of vitrification will be evaluated by egg thaw/survival, fertilization, and implantation rates.