Human ovaries from adnexectomy were perfused via the ovarian artery with constant volume of Thyrode's solution. Perfusion pressure was recorded while doses of PGF2 alpha or PGF2 (2.5, 5 or 10 microgram/min) were infused for 10 min. During the 10-min infusion period an increase in perfusion pressure (delta mm Hg) was observed in proportion to the doses of PGF2 alpha. PGE2 in 2.5- or 5-microgram/min doses were ineffective, but its 10-microgram/min dose increase the perfusion pressure. However, PGE2 (4 microgram/min) infused continuously into the ovary inhibited the vasoconstriction induced by PGF2 alpha, whereas the vasoconstrictor effect of noradrenaline remained unchanged.
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