Luteinizing hormone supplementation increases pregnancy rates in gonadotropin-releasing hormone antagonist donor cycles.

OBJECTIVE

To determine whether LH supplementation improved pregnancy and implantation rates in GnRH antagonist donor cycles.

DESIGN

Donors were randomly assigned to a protocol using GnRH antagonist (GnRH-a) alone or GnRH-a + recombinant LH. Analysis of variance, Student's t-test and Fisher's exact test were used where appropriate.

SETTING

Private clinical setting.

PATIENT(S): Young voluntary donors with antagonist (n = 20) and antagonist + LH (n = 22). Fifty-five patients received oocytes.

INTERVENTION(S): Donors received the GnRH-a (Cetrorelix, 0.25 mg/day) alone or in combination with recombinant LH (75 IU/day). Ovulation induction was carried out with recombinant FSH in a step-down protocol. The endometrial tissue of recipient patients was prepared with oral E(2) and P.

MAIN OUTCOME MEASURE(S): Pregnancy and implantation rates in a donor program.

RESULT(S): A significant increase in MII oocyte (80% vs. 71%), fertilization rates (83% vs. 71%), G1 embryos (17% vs. 3%), and implantation rates (35% vs. 15%), were found in recipients whose embryos originated from donors receiving GnRH-a + recombinant LH as compared to donors receiving GnRH-a alone. Estradiol levels, pregnancy/transfer and clinical pregnancies were lower (not significant) in donors treated with the GnRH-a alone vs. those receiving the recombinant LH-supplemented GnRH-a.

CONCLUSION(S): The LH supplementation improved the possibilities of gestation for recipients whose embryos originated from GnRH-a-treated donors.