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Behavioural signs of oestrus during pregnancy in lactating dairy cows

T J Dijkhuizen1, F J van Eerdenburg

  • 1Department of Herd Health and Reproduction, Faculty of Veterinary Medicine, Utrecht, The Netherlands.

The Veterinary Quarterly
|December 31, 1997
PubMed

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Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...