Abstract
Pregnant gilts received a placebo (CTL; n = 7) or 10 mg of bromocriptine orally (Bromo; n = 7) thrice daily from days 70 to 107 of gestation. Blood profiles of prolactin (PRL), growth hormone (GH) and cortisol were obtained on day 70, after the first treatment with bromocriptine, and on day 107 of gestation. On day 70, concentrations of PRL, GH and cortisol were not affected (P > 0.1) by bromocriptine. By day 107, bromocriptine decreased concentrations of PRL (P < 0.01) whereas concentrations of GH and cortisol were not affected (P > 0.1). Results indicate that long-term treatment with bromocriptine inhibits PRL secretion without affecting GH and cortisol concentrations, while no changes are present within 8 h of initial treatment. Key words: Gilt, gestation, bromocriptine, prolactin
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