Faculty Bibliography

Objective: To establish prognostic relevance of parameters assessed in oocyte donation cycles.Design: Retrospective analysis.Setting: Large university-based donor oocyte program.Patient(s): All oocyte recipient cycles achieving embryo transfer from September 1995 to October 1998.Intervention(s): None.Main Outcome Measure(s): Pregnancy.Result(s): Recipient age and reproductive status, day 9 and 12 serum estradiol (E(2)) levels and a progesterone (P) level obtained 2 days after initiation of hormonal therapy did not correlate with pregnancy. Endometrial thickness, but not endometrial pattern, was useful in predicting pregnancy outcome. The clinical pregnancy and live-birth rate in cycles where the endometrial thickness was less than 8 mm was significantly lower when compared to cycles with an endometrial thickness >/=9 mm. Cycles where optimal quality embryos were transferred had the highest implantation (36%), clinical pregnancy (63%) and live birth (54%) rates and these rates were significantly higher than those of cycles where only poor quality embryos were available for transfer (10% implantation, 17% clinical pregnancy, and 8% live birth rates, respectively; P<.05).Conclusion(s): The most reliable predictive factors for pregnancy in oocyte donation cycles are the quality of the embryos transferred and the recipient's mid-cycle endometrial thickness. Recipient monitoring should minimally include ultrasound assessment of endometrial thickness

OBJECTIVE: To compare implantation and pregnancy rates in oocyte recipients undergoing a two-embryo versus three-embryo transfer, 3 days after retrieval. DESIGN: Retrospective comparative analysis. SETTING: University-based in vitro fertilization center. PATIENT(S): All oocyte recipients undergoing embryo transfer from January 1, 1997 through August 31, 1999. INTERVENTION(S): Recipients received two or three embryos. MAIN OUTCOME MEASURE(S): Implantation, and clinical and multiple pregnancy rates. RESULT(S): Seventy-three recipients underwent a two-embryo transfer, and 376 had three embryos replaced. The numbers of oocytes retrieved (12.7 +/- 0.89 vs. 13.1 +/- 0.36) and embryos obtained (8.05 +/- 0.65 vs. 8.77 +/- 0.27) did not differ between the two-embryo and three-embryo transfer groups, nor did the proportion of patients with embryo cryopreservation (54.3% vs. 42.6%, respectively). There was no significant difference in pregnancy or implantation rates when comparing those patients with a two-embryo transfer to those with a three-embryo transfer. Significantly, 13.8% of the pregnancies in the three-embryo transfer group were triplet. CONCLUSION(S): Reducing the number of embryos transferred in an oocyte donation cycle can lower the incidence of triplet pregnancies without significantly lowering the overall pregnancy rate

OBJECTIVE: To evaluate the efficacy of oral micronized progesterone compared with IM progesterone in oil for luteal support in patients undergoing IVF who are treated with a GnRH agonist. DESIGN: Randomized prospective clinical trial. SETTING: University-based IVF center. PATIENT(S): Women <40 years of age who were undergoing IVF with luteal GnRH pituitary down-regulation. INTERVENTION(S): Patients were randomized to receive either oral micronized progesterone (200 mg three times daily) or IM progesterone (50 mg daily). MAIN OUTCOME MEASURE(S): Progesterone levels at standardized days 21 and 28, and pregnancy and embryo implantation rates. RESULT(S): Day 21 progesterone levels were 77.6+/-13.2 ng/mL in the IM group and 81.5+/-16.2 ng/mL in the oral group. Day 28 progesterone levels were 76.3+/-15.0 ng/mL in the IM group and 53.6+/-10.1 ng/mL in the oral group. The clinical pregnancy rates were 57.9% and 45.8% for the IM and oral groups, respectively. The implantation rate per embryo was significantly higher in the IM group (40.9%) than in the oral group (18.1%). CONCLUSION(S): When used according to our protocols, oral progesterone and IM progesterone result in comparable levels of circulating progesterone. However, oral progesterone results in a reduced implantation rate per embryo