Ovulation Timing in the Bitch

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The Estrous Cycle The estrous cycle is divided into three parts: proestrus, estrus and diestrus. Proestrus starts when the bitch shows her first signs of heat: swelling of the vulva, a blood-tinged vaginal discharge, and attractiveness to male dogs. During this time her estrogen level is rising, and her body is preparing for ovulation. This period lasts 9 days on average, with a range of 2 — 22 days. Estrus starts when the bitch solicits and permits mating. You may see her flagging holding her tail to the side or showing lordosis arching her back to raise her hind end and vulva up for the male. During this time her estrogen is dropping, her progesterone is rising, and her LH luteinizing hormone peaks and falls. This period lasts 9 days on average, with a range of 4 — 21 days. Diestrus starts when the bitch aggressively prevents mating.

Adolescent dogs do not have quality sperm. Almost all dogs will have sperm by one year. Stud dogs are at their prime between 18 months and 4 years old or 5after that, the quality of the sperm starts to lessen, and the aptitude to penetrate eggs, lessens. By 10 years old, most stud dogs accomplish not produce sperm that will drench a bitch.

Contrived insemination of dogs Heat in bitches Female dogs are sexually mature afterwards their first heat, which occurs amid 6 and 12 months of become old. However, being sexually mature does not necessarily imply being physiologically prepared en route for breed. You must wait until your dog has experienced at least a year of heat before allowing her to be mounted. A bitch's reproductive cycle is regulated by; pituitary hormones, luteinizing hormones, follicle stimulating hormones, estrogen and progesterone. Towards the end of this phase there is a acme concentration of estrogen in the blood. At this time, we will abide by that the bitch shows aggressiveness about the male and does not acknowledge copulation, despite him feeling attracted en route for her. In addition, you will advertisement swelling of her vulva ; mediated by estrogen. Likewise, it is average to notice the appearance of blood due to an over-vascularization of the area.