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How to calculate foaling date

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 2 » How to calculate foaling date « Previous Next »


Author Message
 

Vanessa Pierce
Neonate
Username: Starr

Post Number: 1
Registered: 02-2009
Posted on Saturday, February 28, 2009 - 10:51 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hello everyone, I am new to the board. So please bare with me. I have been around horses for some time,just not my own. I got two fee mares recently to teach the children how to ride. One was a rescue senior and I now have my own Maiden Mare who is in foal. But I dont know how to calculate the foaling date. I was told to count 11 months from the last date bred. Is that true? My mare was bred May 9,11,13,15 2008. So if I counted correctally she should foal around March 19th right? I counted every week up untill 11 months. Or do I expect her to foal April 15? I dont know. Some months have 4 weeks others have 5, so really I have know Idea. I really would appreaciate it if anyone could help me.

Sorry about any spelling errors.
 

Samantha
Breeding Stock
Username: Dressage_diva333

Post Number: 477
Registered: 02-2008
Posted on Saturday, February 28, 2009 - 11:20 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

There really is no such thing as a "due date" in horses. The typical range is 320-360 days, with it averaging 339-341 days.

There is a great article on this site:
http://www.equine-reproduction.com/articles/overdue.shtml


But here is the calculator I use to get the "340 day mark":
http://www.steinbeckequine.com/calculator.shtml
 

Vanessa Pierce
Neonate
Username: Starr

Post Number: 2
Registered: 02-2009
Posted on Saturday, February 28, 2009 - 11:33 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank you. Know I am almost to the 300 day mark. Is that when I want to start really watching for things? Or should I wait till 320 day mark since that is also normal range.
 

Jos
Board Administrator
Username: Admin

Post Number: 2292
Registered: 10-1999
Posted on Sunday, March 01, 2009 - 01:04 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

If you look at either the article from this site that's linked above, or the gestational duration range that's shown on the front page of the web site, you'll quickly understand the range of foaling, so technically speaking, one can start looking for signs at 300 days, as that is the earliest that one is likely to have a foal survive if born - although it would definitely be a struggle for it - but as you note, anytime from 320 days onwards is in the "normal" range! Note that under 17% of foals are born in the 339-344 range!
 

Vanessa Pierce
Neonate
Username: Starr

Post Number: 3
Registered: 02-2009
Posted on Tuesday, March 03, 2009 - 09:23 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank you for the help Samantha and Jos. It makes totall sence.

Thanks



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