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  • Title: Manipulating the follicular phase in IVF cycles: a comparison of two hMG stimulation protocols.
    Author: Rabinowitz R, Simon A, Lewin A, Bar-Hava I, Schenker JG, Laufer N.
    Journal: Gynecol Endocrinol; 1989 Jun; 3(2):117-23. PubMed ID: 2510460.
    Abstract:
    The results of two human menopausal gonadotropin (hMG) protocols of ovulation induction for in vitro fertilization (IVF) were compared. With the first protocol, 28 women (group 1) were treated with an hMG dosage which was increased stepwise. With the second, 30 women (group 2) were treated with a high dose of hMG for 2 days, then given a constant daily dose. The two groups were compared with regard to ovarian response, luteal phase and laboratory and clinical outcomes of IVF. They were comparable as regards the total number of hMG doses required, the number of large follicles (mean diameter greater than 15 mm) on day 0 (day of human chorionic gonadotropin (hCG) administration), serum estrogen (E2) and progesterone (P) levels throughout the cycle and IVF laboratory and clinical outcomes. They differed significantly (p less than 0.01) only in the number of secondary smaller follicles (mean diameter less than 15 mm) observed on day 0 (3.7 +/- 0.4 for group 1 and 5.3 +/- 0.4 for group 2). Manipulating the hMG dosage during the early-mid follicular phase does not affect follicular synchrony, the number of oocytes harvested and the number of embryos achieved.
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