@article {6051,
	title = {Pregnancy results after ovum donation following one to seven embryo transfers},
	journal = {Fertility and Sterility},
	volume = {66},
	year = {1996},
	month = {1996///},
	pages = {765 - 768},
	abstract = {Objective: To determine whether failure to achieve pregnancy after repeated ET after ovum donation was due to an endometrial defect or to the embryo quality. Design: Retrospective data analysis. Setting: A private infertility center. Patient(s): Four hundred sixty-seven donors (513 cycles) undergoing IVF donating oocytes to 266 recipients (423 cycles). Intervention(s): Hormonal endometrial preparation with increasing dosages of valerate E2 (2, 4, and 6 mg) and 100 mg of P. Main Outcome Measure(s): Pregnancy rates (PRs) and abortion rates in patients undergoing one to seven ETs after ovum donation. Result(s): Pregnancy rates in recipients that had one or two ETs were significantly higher (34.8\%) compared with those of recipients having three or more ETs (15.1\%). Abortion rates were significantly higher (54.5\%) in recipients repeating more than three ETs than in the recipients having one or two ETs (29.1\%). Conclusion(s): Recipients that had failed to establish a pregnancy after two ETs had a lower PR in successive attempts, possibly because of a defect of their endometrial lining.},
	keywords = {embryo quality, endometrial lining, Oocyte donation, repeated embryo transfers},
	author = {Mantzavinos, T. and Dimitriadou, F. and Kanakas, N. and Rizos, D. and Arvaniti, K. and Voutsina, K.}
}
