Vie CONG. INTERN. REPROD. ANIM. INSEM. ARTIF., PARIS, 1968, VOL. I

TABLE 1

The difference in fertility level as measured as nonreturns
at 24 and at 200 days after insemination for each day of
semen storage at 4°C when reported as the absolute % of cows
inseminated and as the % of those considered pregnant at the
date of first assay (24 days).

Age of diluted semen at time
of insemination (days)?

I 2 > 4 5 Mean
% cows insem. 20.2 7.3 Wl o205 el 17.9
% cows missing
estrus for 24 days 2552 21.0 227 28.1 30.5 2229
aDay 1 = day of collection.
TABLE 2

Conversion factor to change 46-167 day nonreturn fertility
difference estimate to a 24-200 day fertility difference
for each day of semen storage at 4 C.

Age of diluted semen at time
of insemination (days)®

 

 

1 2 3 4 5 Mean
24-200 day NR
46-167 day NR 1.98 2.02 1.96 252 2.05 2.04
aDay 1 = day of collection.

1201