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  • Title: Successful pregnancies in patients with estrogenic anovulation after low-dose human chorionic gonadotropin therapy alone following hMG for controlled ovarian hyperstimulation.
    Author: Lee KL, Couchman GM, Walmer DK.
    Journal: J Assist Reprod Genet; 2005 Jan; 22(1):37-40. PubMed ID: 15807221.
    Abstract:
    OBJECTIVE: To demonstrate that folliculogenesis can be sustained with 200 IU human chorionic gonadotropins (hCG) after FSH-priming and result in pregnancy in women with estrogenic ovulatory dysfunction and risk factors for severe ovarian hyperstimulation syndrome (OHSS). CASE REPORT: Three women with infertility associated with estrogenic ovulatory dysfunction and hyperinsulinemia who appeared to be at high risk for severe OHSS during gonadotropin therapy. INTERVENTIONS: After 10 days of receiving either 150 IU hMG or recombinant FSH, patients were switched to 200 IU hCG/day alone for 2-3 days. 5,000 IU of hCG was then administered followed by either home intercourse, intrauterine insemination or transvaginal oocyte retrieval-embryo transfer. MAIN OUTCOME MEASURES: Endovaginal ultrasound measurement of follicle number and size, serum estradiol levels, symptoms of ovarian hyperstimulation, pregnancy test, and evaluation of pregnancy by transvaginal ultrasound. RESULTS: After discontinuation of hMG or recombinant FSH, serum estradiol concentrations continued to rise, and follicles >14 mm continued to grow during low-dose hCG administration. All women conceived without developing symptoms of OHSS. Pregnancy outcomes achieved include a term singleton delivery, a term twin delivery, and triplets delivered at 31 weeks gestation. CONCLUSION: The use of low-dose hCG alone is sufficient for supporting the late stages of folliculogenesis in women with estrogenic ovulatory dysfunction. This ovulation induction regimen appears to support the follicular growth of larger follicles while decreasing the number of smaller preovulatory follicles, thereby reducing a known risk factor for OHSS. We report on the positive pregnancy outcomes in 3 women with estrogenic ovulatory dysfunction and clinically appeared to be at high risk for developing severe OHSS who safely underwent this protocol.
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