Post by brightraven on Jan 15, 2020 5:06:26 GMT -6
Anyone who does a lot of heat detection and AI breeding has observed the bleed off (metestrus) in cattle. It occurs about 2 to 3 days after the standing heat. I have seen it as soon as one day after standing heat. Most of the time, I don't see it. Here is a picture of one of my cows having a metestrus bleed off.
All placental mammals have a thickening of the uterine wall in preparation for the implantation of the zygote (fertilized ovum) but in most mammals except primates ( there are a couple minor exceptions), the build up of the uterine wall is reabsorbed. I mention that because metestrus is not the same as menses in primates. The discharge at metestrus is just some blood that builds up in the uterine body due to leakage.
The value of seeing a metestrus bleed off is that it confirms the cow had a mature follicle and released an egg.
All placental mammals have a thickening of the uterine wall in preparation for the implantation of the zygote (fertilized ovum) but in most mammals except primates ( there are a couple minor exceptions), the build up of the uterine wall is reabsorbed. I mention that because metestrus is not the same as menses in primates. The discharge at metestrus is just some blood that builds up in the uterine body due to leakage.
The value of seeing a metestrus bleed off is that it confirms the cow had a mature follicle and released an egg.
