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Biology of Reproduction, Vol 35, 792-798, Copyright © 1986 by Society for the Study of Reproduction

ARTICLES

Mating-induced luteinizing hormone surge and ovulation in the female camel (Camelus dromedarius)

M Marie and A Anouassi

Blood samples were collected after mating from four female one-humped camels every 10 min for 9-12 h. Luteinizing hormone (LH) was quantified in plasma by radioimmunoassay using antibovine LH. Of the seven observed matings, five were followed by a release of LH, and three by an ovulation (indicated by a subsequent secretion of progesterone). LH levels at the time of mating ranged from 0.7 to 3 ng/ml. When an LH response occurred, the levels increased 1 h after mating and reached a maximum in 2-3 h (ranging from 2.9 to 19.1 ng/ml). A decrease in LH was observed starting 6 h after mating and lasting for 6 h. These results are in agreement with a coitus-induced mechanism of ovulation in the one-humped camel (Camelus dromedarius). They confirm and extend the observations reported in the bactrian camel (Camelus bactrianus).


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S D Johnston, P O'Callaghan, K Nilsson, G Tzipori, and J D Curlewis
Semen-induced luteal phase and identification of a LH surge in the koala (Phascolarctos cinereus)
Reproduction, November 1, 2004; 128(5): 629 - 634.
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Copyright © 1986 by the Society for the Study of Reproduction.