This message is from: [EMAIL PROTECTED] (BRIAN C JACOBSEN)

The results of the gestation length survey are in!

Out of 41 foalings, the average gestation length was 341 days.

These included foalings from 13 different years, and from several
different parts of the country.

The average varied considerably by year.  The lowest average was 332 days
(1980)(five foalings).  The highest average was 357 days (1989)(three
foalings).

The shortest gestation length reported was 318 days (10-1/2 months).

The longest length recorded was 367 days (12 months, 2 days).

I believe we actually had a mare go 13 months one year (this was a long
time ago).  I could not find records of her foalings though to
substantiate it

Was not able to compare colts vs. fillies - was not always told the sex
of the foal by those responding.


To easily calculate 341 days, count back from your last breeding date 24
days.  Don't bother flipping ahead in your calendar to next year - you
don't have to.  Just look at the month your mare was bred; It doesn't
matter what year you are using.  For example, if you have a mare who was
bred today, June 30, counting back 24 days gets you to June 6 as the due
date.

Happy Foaling!

Brian Jacobsen
Salisbury, North Carolina

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