1. The term unexplained infertility should be used only after a thorough infertility investigation has failed to reveal an identifiable source and the duration of infertility is 24 months or more. History, physical examination, documentation of ovulation, endometrial biopsy, semen analyses, PCT, hysterosalpingogram, and laparoscopy should have been completed.
2. Because couples with unexplained infertility lack an identifiable causative factor of their infertility, empirical treatment with clomiphene therapy increases the spontaneous pregnancy rate to 6.8% per cycle compared with 2.8% in placebo-control cycles. For optimal results, gonadotropins should be used for ovulation induction. Intrauterine insemination, in vitro fertilization and gamete intrafallopian transfer (GIFT) are additional options. References: See page 146.
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