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  Rebel Without a Cause
Posts: 2758
   
Location: Adopt a homeless pet - www.petfinder.com! | What day is considered the date of conception? The day they are bred (cooled semen) or the day they ovulated? |
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| You use the last breeding date to figure your 345 days of avg gestation ...
if your vet is coming back to check on ovulation after CS insemination ..
get you a new vet ... the less digging around in there you do better chance of
mare getting pregnant ..
and it is best to check the mare at 20-22 days vs the fad of 14 days.
14 days terrible ultrasonic because embryo is so small ..
it doubles in size each day ...
20-22 days embryo is easier to see on ultrasound and it is more firmly attached
and if mare did not get in foal she should be starting her next heat cycle so
you get to start figuring her next ovulation ... this is a 2 for 1 deal of seeing
an embryo easily or seeing the start of a heat cycle ..
How to figure the 345 days .... just back up 20 days from the last breeding date.
i.e. LBD= APRIL 25 .... 345 DAYS APRIL 5TH ....
Edited by BARRELHORSE USA 2015-06-13 2:26 PM
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 Take a Picture
Posts: 12841
| The easiest way to calculate is to Google mare gestation calculator. I believe it is Mare Stare. |
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Rebel Without a Cause
Posts: 2758
Location: Adopt a homeless pet - www.petfinder.com! | My mare's at a top repro facility in Oklahoma so I've no worries about her care. She's been confirmed in foal and there was a heartbeat at 25 days. I was using one of the online foaling calculators and it it asks you to put in the date of conception. I wasn't sure if that was the date she was inseminated or the date they confirmed she ovulated (48 hours later).
Edited by Calangelo 2015-06-13 11:43 PM
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Rebel Without a Cause
Posts: 2758
Location: Adopt a homeless pet - www.petfinder.com! | streakysox - 2015-06-13 11:04 PM
The easiest way to calculate is to Google mare gestation calculator. I believe it is Mare Stare.
Thanks, that helps! |
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 Coyote Country Queen
Posts: 5666
| If you know date of ovulation then that is the date I would use. But even if you use last breeding date you're still going to be very close on the due date.
I guess to each his own, but we always confirm ovulation and we check at 14 days to ensure there are no twins. Then we check again for a heartbeat. The facility I use has an excellent record at getting mares in foal, and I believe in their program. |
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| Calangelo - 2015-06-13 11:41 PM
My mare's at a top repro facility in Oklahoma so I've no worries about her care. She's been confirmed in foal and there was a heartbeat at 25 days. I was using one of the online foaling calculators and it it asks you to put in the date of conception. I wasn't sure if that was the date she was inseminated or the date they confirmed she ovulated (48 hours later).
If your super repro specialist had any confidence in their procedure timing on insemination ....
they would not have to look to see if mare ovulated 48 hours later ... too late to do anything other than to add another cost to your vet bill...
and then they apparently scoped again in the 14 day range and again at 25 days ...
Some day you will back off and let Mother Nature take her course with a minimum of digging around from these bedside vets.... and stop throwing your money around when you get several mares they run the bill up on ... lol
And for the breeding date ... when you human mothers got pregnant what date did you tell your doctor ... the date you remember that you had sex or the imagined date you think you had an ovulation .. lol
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 Midget Lover
Location: Kentucky | I would use ovulation date, if you know it. I check at 15 and 30 days. My vet also checked to see if she ovulated two days after insemination. IMO, it's just a peace of mind. |
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 Elite Veteran
Posts: 933
Location: north dakota | BARRELHORSE USA - 2015-06-14 1:32 AM
Calangelo - 2015-06-13 11:41 PM
My mare's at a top repro facility in Oklahoma so I've no worries about her care. She's been confirmed in foal and there was a heartbeat at 25 days. I was using one of the online foaling calculators and it it asks you to put in the date of conception. I wasn't sure if that was the date she was inseminated or the date they confirmed she ovulated (48 hours later).
If your super repro specialist had any confidence in their procedure timing on insemination ....
they would not have to look to see if mare ovulated 48 hours later ... too late to do anything other than to add another cost to your vet bill...
and then they apparently scoped again in the 14 day range and again at 25 days ...
Some day you will back off and let Mother Nature take her course with a minimum of digging around from these bedside vets.... and stop throwing your money around when you get several mares they run the bill up on ... lol
And for the breeding date ... when you human mothers got pregnant what date did you tell your doctor ... the date you remember that you had sex or the imagined date you think you had an ovulation .. lol
I check around 14 days after ovulation. Most of the time if there not bred they are building a follicle and I need to get semen ordered. If I waited later to US I would miss that heat cycle.
As far as humans go the date is based off the first day of your last period.
Edited by ndcowgirl 2015-06-14 11:13 AM
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Rebel Without a Cause
Posts: 2758
Location: Adopt a homeless pet - www.petfinder.com! | BARRELHORSE USA - 2015-06-14 1:32 AM Calangelo - 2015-06-13 11:41 PM My mare's at a top repro facility in Oklahoma so I've no worries about her care. She's been confirmed in foal and there was a heartbeat at 25 days. I was using one of the online foaling calculators and it it asks you to put in the date of conception. I wasn't sure if that was the date she was inseminated or the date they confirmed she ovulated (48 hours later). If your super repro specialist had any confidence in their procedure timing on insemination .... they would not have to look to see if mare ovulated 48 hours later ... too late to do anything other than to add another cost to your vet bill... and then they apparently scoped again in the 14 day range and again at 25 days ... Some day you will back off and let Mother Nature take her course with a minimum of digging around from these bedside vets.... and stop throwing your money around when you get several mares they run the bill up on ... lol And for the breeding date ... when you human mothers got pregnant what date did you tell your doctor ... the date you remember that you had sex or the imagined date you think you had an ovulation .. lol
Why do you feel the need to be such a know-it-all ass? It's a flat fee I'm paying and the cost has been very reasonable so no I don't think they're trying to just add more to my bill. This is the first mare I've ever bred (and probably the last, this isn't a business for me) and I'm asking these questions so I can learn and I don't need your flippant b.s.
Edited by Calangelo 2015-06-14 11:25 AM
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 A Somebody to Everybody
Posts: 41354
Location: Under The Big Sky Of Texas | I always thought it was the last breeding date, Good luck on your mare I hope that shes bred so you can enjoy the wait, lol..  |
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Rebel Without a Cause
Posts: 2758
Location: Adopt a homeless pet - www.petfinder.com! | Southtxponygirl - 2015-06-14 11:31 AM
I always thought it was the last breeding date, Good luck on your mare I hope that shes bred so you can enjoy the wait, lol..
Thanks! She has been confirmed in foal and I'm so excited!! |
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A Somebody to Everybody
Posts: 41354
Location: Under The Big Sky Of Texas | Calangelo - 2015-06-14 11:33 AM Southtxponygirl - 2015-06-14 11:31 AM I always thought it was the last breeding date, Good luck on your mare I hope that shes bred so you can enjoy the wait, lol.. Thanks! She has been confirmed in foal and I'm so excited!!
How cool is that  , congrats on your first mare being in foal, next year you can show off that baby.  |
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 The Color Specialist
Posts: 7530
Location: Washington. (The DRY side.) | I go by the last breeding date. You KNOW when that is. You don't know for sure when they ovulate. If you are wanting a date to figure out when she is "due", the difference between last breeding date and ovulation date isn't going to make a nickles worth of difference. (Since mares have such a HUGE variation in "normal" gestation length. ( From 320 to 365 days gestation is considered "normal" for a mare.)
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 Goat Giver
Posts: 23166
| Calangelo - 2015-06-14 11:21 AM BARRELHORSE USA - 2015-06-14 1:32 AM Calangelo - 2015-06-13 11:41 PM My mare's at a top repro facility in Oklahoma so I've no worries about her care. She's been confirmed in foal and there was a heartbeat at 25 days. I was using one of the online foaling calculators and it it asks you to put in the date of conception. I wasn't sure if that was the date she was inseminated or the date they confirmed she ovulated (48 hours later). If your super repro specialist had any confidence in their procedure timing on insemination .... they would not have to look to see if mare ovulated 48 hours later ... too late to do anything other than to add another cost to your vet bill... and then they apparently scoped again in the 14 day range and again at 25 days ... Some day you will back off and let Mother Nature take her course with a minimum of digging around from these bedside vets.... and stop throwing your money around when you get several mares they run the bill up on ... lol And for the breeding date ... when you human mothers got pregnant what date did you tell your doctor ... the date you remember that you had sex or the imagined date you think you had an ovulation .. lol Why do you feel the need to be such a know-it-all ass? It's a flat fee I'm paying and the cost has been very reasonable so no I don't think they're trying to just add more to my bill. This is the first mare I've ever bred (and probably the last, this isn't a business for me ) and I'm asking these questions so I can learn and I don't need your flippant b.s.
I recommend the ignore button. I not only have a hard to settle mare bred this year, I have another embryo in a recip thanks to a dedicated vet and stallion manager who were not afraid to do some "checking" and different things to make it happen. I use the ovualtion date for calcuations and I wish you good luck. |
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 Night Chat Leader
Posts: 13150
Location: Home....Smiling M Farms | How is your new baby bred? I'm excited for you :) babies are so much fun :) |
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Rebel Without a Cause
Posts: 2758
Location: Adopt a homeless pet - www.petfinder.com! | Leo - 2015-06-14 4:19 PM How is your new baby bred? I'm excited for you :) babies are so much fun :)
Thank you! My mare is Fishers Dash x Stylish Form x The Signature. She's a producer on the track. I bred her to Frenchmans Fabulous. I'm so exicted I can hardly stand it!! |
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Night Chat Leader
Posts: 13150
Location: Home....Smiling M Farms | Calangelo - 2015-06-14 5:40 PM
Leo - 2015-06-14 4:19 PM How is your new baby bred? I'm excited for you :) babies are so much fun :)
Thank you! My mare is Fishers Dash x Stylish Form x The Signature. She's a producer on the track. I bred her to Frenchmans Fabulous. I'm so exicted I can hardly stand it!!
Wow!! Sounds like that is going to be a super nice baby!! |
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 My Heart Be Happy
Posts: 9159
Location: Arkansas | Congratulations! I can't even imagine how excited you are. And she'll deliver that pretty baby on HER time table, so ignore that other tacky reply!! |
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| Calangelo - 2015-06-14 11:21 AM
BARRELHORSE USA - 2015-06-14 1:32 AM Calangelo - 2015-06-13 11:41 PM My mare's at a top repro facility in Oklahoma so I've no worries about her care. She's been confirmed in foal and there was a heartbeat at 25 days. I was using one of the online foaling calculators and it it asks you to put in the date of conception. I wasn't sure if that was the date she was inseminated or the date they confirmed she ovulated (48 hours later). If your super repro specialist had any confidence in their procedure timing on insemination .... they would not have to look to see if mare ovulated 48 hours later ... too late to do anything other than to add another cost to your vet bill... and then they apparently scoped again in the 14 day range and again at 25 days ... Some day you will back off and let Mother Nature take her course with a minimum of digging around from these bedside vets.... and stop throwing your money around when you get several mares they run the bill up on ... lol And for the breeding date ... when you human mothers got pregnant what date did you tell your doctor ... the date you remember that you had sex or the imagined date you think you had an ovulation .. lol
Why do you feel the need to be such a know-it-all ass? It's a flat fee I'm paying and the cost has been very reasonable so no I don't think they're trying to just add more to my bill. This is the first mare I've ever bred (and probably the last, this isn't a business for me ) and I'm asking these questions so I can learn and I don't need your flippant b.s.
I didn't know they allowed cussing on this board ...
If you needed a politically correct answer ...
then you are going to be ticked off at me for the rest of your life ..
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 Best of the Badlands
Location: You never know where I will show up...... | Most all of our foals born at our ranch are now embryo transfer. We use the day of ovulation as the 'conception date'. We flush the mares from 7-8 days post ovulation, so it is very important to know when they ovulate.
It is always recommendable to check them back and make sure they ovulate. I have had several mares build huge follicles and then regress them without ovulating. This happens a lot early in the season. There are lots of other reasons to check them back too, double ovulation is one reason and post breeding fluid from delayed uterine clearance is another reason to be checking those mares back. Most good repro vets will be doing that routinely.
Realizing the "ignorance is bliss" approach seems to work for some people, I am not willing to take a chance on it for the time and money I have invested in our breeding program.
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 Champ
Posts: 19623
Location: Peg-Leg Julia Grimm | Amy ^^^
I just have one thing to add. If you have your own stallion and you are teasing the mare back you can wait until they are 20ish days post last breeding to preg check them. As long as they don't come back in heat, you're good. But if you are shipping semen, you need to check on day 14-16 so you have time to order more semen for the next try. If you wait until 20 days to check you might (probably will) miss that cycle and have to short cycle her. That said, I have a mare that goes 24ish days ovulation to ovulation. So she has her own schedule.
ETA: I count from the last known breeding date or the date of ovulation if we know what it is or isn't. It's more likely I would know the ovulation date if we are breeding A-I because we "manage" them a lot more closely with A-I breeding.
Edited by OregonBR 2015-06-15 12:12 PM
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How is conception date determined in mare?