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Human Reproduction, Vol. 6, No. 5, pp. 659-664, 1991
© 1991 European Society of Human Reproduction and Embryology

other

The effects of clomiphene citrate upon ovulation and endocrinology when administered to patients with unexplained infertility

John M. Randall1 and Allan Templeton

Department of Obstetrics and Gynaecology, University of Aberdeen Maternity Hospital, Cornhill Road, Aberdeen AB9 2ZD, UK

Correspondence: 4To whom correspondence should be addressed at: Department of Obstetrics and Gynaecology, Bradford Royal Infirmary, Duckworth Lane, Bradford, West Yorkshire, BD9 6RJ, UK

Twenty-four couples with unexplained infertility were studied in a spontaneous cycle followed by a clomiphene citrate (CC) cycle (150 mg, days 5–9). All spontaneous cycles were ovulatory, as defined by follicular collapse determined by transvaginal sonography. In CC cycles, 6/24 (25%) cycles demonstrated luteinized unruptured follicles (LUF). In 2/6 LUF cycles there was no apparent luteinizing hormone (LH) surge. LUF cycles had significantly elevated LH levels in the follicular phase compared to ovulatory CC cycles. There was no apparent difference in serum oestradiol. In CC cycles multifollicular development occurred in 87.5% of cycles, with significantly elevated serum oestradiol. Luteinizing hormone and fofficle-stimulating hormone were elevated in the folilcular phase compared to spontaneous cycles. This study suggests a high incidence of LUF when CC is administered to ovulatory patients, and its use in patients with ovulatory infertility is questioned.

Key words: clomiphene/unexplained infertility


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