Among infertile couples, treatment with induction of superovulation and intrauterine insemination is three times as likely to result in pregnancy as is intracervical insemination and twice as likely to result in pregnancy as is treatment with either superovulation and intracervical insemination or intrauterine insemination alone.

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A system was devised for measuring the oxygen tension within the lumen of the fallopian tube in the unanaesthetized rabbit. After preliminary readings which revealed a mean intraluminal pO2 of 60 mm Hg, ovulation was induced with i.v. HCG. The oxygen tension remained essentially unchanged at the estimated time of ovulation and in the first 3 days after ovulation.

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