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HCG, ECG question

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 2 » HCG, ECG question « Previous Next »


Author Message
 

Aeysha Major
Neonate
Username: Sp_ranch

Post Number: 4
Registered: 07-2006
Posted on Thursday, July 20, 2006 - 11:35 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

SOrry JOs i'm going to have a bunch of questions for you. I've been looking for a place like this :-) and you're doing a great job of clearing up the ones i've already asked. Anyhow on to the question-

I used to work at a breeding facility and we injected mares with HCG( as many places do) to get the mares to ovulate. But yet I read on these boards that horses don't produce HCG, they produce ECG. Can you clear this up for me?
 

Jos
Board Administrator
Username: Admin

Post Number: 920
Registered: 10-1999
Posted on Friday, July 21, 2006 - 12:17 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Similar hormones, different species of origin, different functions when in the equine.

hCG is human chorionic gonadotropin.

eCG is equine chorionic gonadotropin.

hCG is used in the equine for it's luteinising hormone-like effect, which results in a stimulation of ovulation.

eCG is secreted by the mare after about day 36 of pregnancy and is responsible for the stimulation of production of secondary follicles and the luteinization of those follicles to become secondary corpora lutea, which in turn secrete progesterone that assists in maintaining pregnancy until around 120 days.



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