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The insertion of a glass cannula into the uterine branch of the utero-ovarian vein, followed by disconnection of all other tissues between the uterus and the ovary containing the luteal tissue in non-pregnant sheep, was followed by a prolongation of luteal function. A pathway involving uterine venous blood alone is therefore insufficient to explain the transfer of PGF-2 alpha from the uterus to the ipsilateral ovary. We suggest that lymph is also involved.

Surgical separation of the uterus and ovaries with simultaneous cannulation of the uterine vein extends luteal function in sheep