The following is based on a national field study of breeding with cooled, transported semen (consisting of 55 mares and three stallions)

1) The results showed that transported semen can achieve conception rates equal to those on the best farms.

2) The mares were nearly equally divided among barren, maiden and foaling categories.

3) There was less than 5% difference between stallions.

4) There was no statistical difference between those mares bred between 6 and 12 hours and those bred between 12 and 24 hours after collection. 66% were bred between 6 and 12 hours. 34% were bred between 12 and 24 hours.

% in foal 6 to 12 hours - 88%
% in foal 12 to 24 hours - 93%

5) As expected, barren mares did slightly less well than maiden or foaling mares: 82% got in foal.

6) Average number of cycles bred to get in foal.

Foaling mares - 1.2 cycles
Maiden mares - 1.7 cycles
Barren mares - 1.9 cycl

7) Cumulative statistics per cycle for all mares.

1st cycle total percentage of mares in foal - 62%
2nd cycle total percentage of mares in foal - 82%
3rd cycle total percentage of mares in foal - 90%

(Please note that all mares were bred by veterinarians who included reproductive work in their practice.)