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Questions on ovulation

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 2 » Questions on ovulation « Previous Next »


Author Message
 

Charlotte
Nursing Foal
Username: Flybynite

Post Number: 16
Registered: 04-2006
Posted on Friday, February 23, 2007 - 03:01 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

My mare foaled Mon 2/12 in the morning.
Mon 2/19 - she was in heat & would have stood to breed.
Tues 2/20 - Had the vet out, u/s showed some edema but vet could only find a 24 follicle. Vet suggests re-u/s on Friday 2/23. I double check he wants to go that long with her showing heat already, but he couldnt find anything else going on.
Weds 2/21 - Mare is showing to anything with legs, the resident stud, dogs, humans, whatever. I call the stud owner (who's about 20 min haul away), he suggests breeding Thursday 2/22 since she had nothing going on the day before. It seemed reasonable to me.
Thurs 2/22 - Teased her and you guessed it, out of heat and very obvious about it. I tried leaving her in the stall next to the resident stud for 15 min just in case, but nothing.

*sigh* So what could have happened? There was another follicle? She grew 15mm over night? She ovulated on a 30? All of these are somewhat uncommon arent they?

I canceled the appt for this morning thinking I'd be seeing my vet daily to track the next heat cycle, but maybe I should have kept it to confirm she ovulated? Anything I could/should be doing differently here?

Also, when they talk about foal heat & the number of days post foaling, is the day they foaled day 1 or day 0?

Thanks, Charlotte
 

cathy Cook
Yearling
Username: Razmacat

Post Number: 79
Registered: 08-2005
Posted on Friday, February 23, 2007 - 03:11 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

You are lucky. I never us the foal heat. Mares are more likely to abort that fetus than in any other heat. Think about it, did you want to have sex 9 days after giving birth? Just short cycle the foal heat, I am doing that right now with two mares.
 

Jos
Board Administrator
Username: Admin

Post Number: 1204
Registered: 10-1999
Posted on Friday, February 23, 2007 - 10:26 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

2 possibilities:
  1. The scenarios you describe;
  2. She became "silent" as a protective measure to the foal when exposed to the stallion.
Without an ultrasound that confirms presence of a CL there is no point in giving prostaglandin - or at least, it may result in unreliable responses.

The fact that nature allows establishment of a pregnancy in the mare on foal heat pretty much negates the concept that one shouldn't breed on foal heat... that's an anthropomorphization... :-)

There are 4 factors that will increase pregnancy rates on foal heat breedings:
  1. No problems with the foaling (no retained placenta, dystocia etc.);
  2. No abnormalities with the placenta (thickening or thinness) which could suggest placentitis and therefore a uterine pathogen;
  3. No vaginal discharge by day 6/7 - or only slight clear discharge if any;
  4. The ovulation occurring at least 10 days after foaling.
 

marie dooley
Neonate
Username: Radha

Post Number: 5
Registered: 02-2007
Posted on Sunday, February 25, 2007 - 10:06 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Anthropomorphizing? We are all animals. Common sense, ( pun intended), tells me that many mammals, would benefit from a slightly longer time to recuperate from the rigors of birth than 5-9 days. ( I warn you...do NOT try to tell a mom of two that "rigorous" does not correctly describe birth.) I've seen enough equine births now to know it's no day grazing in clover, either! LOL
 

Jos
Board Administrator
Username: Admin

Post Number: 1209
Registered: 10-1999
Posted on Sunday, February 25, 2007 - 10:24 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Your hypothesis doesn't match nature or research - at least as far as the equine is concerned (and that is all I am referring to!) - so yes, I am telling a mom of two, because I don't want readers of the board to get an innacurate impression that I agree with your observations!! I don't!! :-)

I should also point out that I did observe that in order to achieve maximal pregnancy rates on a foal heat breeding one of the required criteria is an ovulation that occurs at least 10 days after foaling (not 5-9).
 

marie dooley
Neonate
Username: Radha

Post Number: 6
Registered: 02-2007
Posted on Monday, February 26, 2007 - 07:46 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Nature is cruel...but I gently contend that the breeder should not be "red in tooth and claw" if at all possible. Is it not true that foal heat breedings statistically produce less viable pregnancies than later heats? Has that hypothesis changed? Do broodmares in captivity live longer than their counterparts in the wild?



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