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13 day embryo, how hard is it to find?

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 2 » 13 day embryo, how hard is it to find? « Previous Next »


Author Message
 

Shana Howell
Neonate
Username: Drsgrider

Post Number: 1
Registered: 07-2006
Posted on Monday, July 03, 2006 - 08:57 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Just got back from the vet, I had to go in one day early post ovulation/breeding. She thought she saw something at the cervix but is not sure. Uterus has tone and not yet in heat. We are rechecking in 3 days, but how much different in size is a 13 day embryo from a 14 day embryo?
Thanks!!
 

Jos
Board Administrator
Username: Jos

Post Number: 10816
Registered: 10-1999
Posted on Monday, July 03, 2006 - 09:28 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Between about day 9 and about day 16 the conceptus (the embryo proper is not yet visible per ultrasound) roughly doubles in size on a daily basis. In other words, a day 13 conceptus is about half the size of a day 14.

If the mare is 13 days post-ovulation, uterine tone and lack of estrus is not likely to be indicative of anything except that the mare is not in estrus. The increase in uterine tone associated with pregnancy doesn't appear until about day 14/15/16.



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