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OXYTOCIN-PRODUCED CHANGES IN THE BOVINE OVARY BEFORE AND AFTER UNILATERAL OVARIECTOMY

1969; Bioscientifica; Volume: 20; Issue: 1 Linguagem: Inglês

10.1530/jrf.0.0200039

1741-7899

John C. Carlson, D. L. Black,

Neuroendocrine regulation and behavior

Summary. Exogenous oxytocin in intact heifers shortened the oestrous cycle and decreased luteal progesterone content and in vitro synthesis both with and without the addition of lh to the incubation medium. Unilateral ovariectomy decreased the proportion of shortened oestrous cycles following oxytocin treatment. Both the removal of one ovary and oxytocin injection are thought to upset the normal hypophysial—gonadal balance of hormones leading to increased variability in cycle length.