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Minimal stimulation IVF using clomiphene citrate and oral contraceptive pill pretreatment for LH suppression
1Bellingham IVF and Infertility Center, Bellingham, Washington, USA.
Objective:
To determine if oral contraceptive pill (OC) pre-treatment prior to minimal stimulation IVF using clomiphene citrate (CC) would make the procedure easier to perform by preventing the LH surge and result in pregnancy rates (PRs) comparable to stimulated IVF.
Design:
Prospective cohort study.
Setting:
Private tertiary infertility center.
Patient(S):
Thirty-two women with tubal or pelvic adhesive disease as the cause of their infertility, ovulatory cycles, under the age of 40, and no male factor.
Intervention(S):
Two-month ovarian-hypothalamic-pituitary axis suppression with OC followed by CC 100 mg on day 3 of the cycle for 8 days, hCG administration midcycle, follicle aspiration, IVF, and embryo transfer.
Main Outcome Measure(S):
Oocytes retrieved, serum LH and estradiol levels, maturity of oocytes, fertilization rates, embryo number and quality, and PRs.
Result(S):
Thirty-six patients completed 71 stimulation cycles and 64 follicle aspirations. No LH surges occurred with a mean mature oocytes retrieved of 3.2, 90% fertilization rate, and mean 2.5 embryos transferred. Twenty-one of the 64 cycles resulted in a clinical pregnancy (32.8% PR per retrieval) with 2 other biochemical pregnancies and 3 twin gestations. This was not significantly different from the matched cohort stimulated IVF.
Conclusion(S):
Minimal stimulation IVF is a simple, low-cost, and low-risk alternative to stimulated IVF with comparable PRs.