Equine-Reproduction.com Bulletin Board: Heat during pregnancy

Equine-Reproduction.com Bulletin Board

Heat during pregnancy

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 1 » Heat during pregnancy

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DLB
Posted From: 209.53.84.130

Posted on Monday, September 06, 2004 - 07:03 pm:

I have a mare that is at approx. 104 days of pregnancy and showing signs of estrous. I understand that progesterone that is produced by the ovaries is declining at this time. Could she be showing signs of heat and still be pregnant.
Thank you

Jos
Posted From: 4.244.180.151

Posted on Tuesday, September 07, 2004 - 12:22 am:

Anywhere from about 70 days of pregnancy onwards, the fetus starts to secrete increasing amounts of another hormone - estrone sulfate. These secretion levels peak at about 240 days and decline to the foaling time.

Estrone sulfate can be responsible for estrus displays in the pregnant mare.

Of course, she may also not be pregnant, but a hormone assay for estrone sulfate or total estrogens will prove a reliable indicator at this time. Rectal palpation and ultrasound when performed by an experienced technician can also be accurate, but may also lead to confusing results if the weight of the growing fetus has pulled it over the edge of the pelvic brim. If that has happened, the fetus itself may not be palpable, and there may therefore not be a definitve diagnosis of pregnancy.

DLB
Posted From: 209.53.84.69

Posted on Tuesday, September 07, 2004 - 12:38 am:

Thank you Jos. I am able to draw blood, so will go to my local vet for a vacu-tainer. What color top is needed for a hormone assay. We are a days drive from an equine repro vet. Your help is appreciated. Thanks

DLB
Posted From: 209.53.84.69

Posted on Tuesday, September 07, 2004 - 12:41 am:

Jos, I should also ask what should the results of this test be if she is still pregnant and if she is not pregnant. Thanks

Joan (Unregistered Guest)
Unregistered guest
Posted From: 209.226.122.190

Posted on Saturday, July 09, 2005 - 08:58 am:

Mare was determined in foal at day 16 post breeding by ultrasound. Also had a clean cytology prior to breeding. It is now day 23 and she showed light signs of estrous last evening to a gelding. I think I heard that around this time of conception there is an hormone change that may produce signs of heat in the mare. Should I be concerned at this point?

Renee (Unregistered Guest)
Unregistered guest
Posted From: 203.49.156.163

Posted on Sunday, July 10, 2005 - 07:24 pm:

Joan,
I have a mare, that dispite settling on the first mating each year, she always shows signs of heat the following month. It is not unsual and very possible that your mare is still pregnant.

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