Mating age and results

A common question asked is the age of mating for Fullblood Dorper and White Dorper Maiden ewes and the expected results. After checking on most of the available websites, there were many claims but no facts so I have correlated the following results.

2007 drop Dorper and White Dorper ewes. Ewes were split into 2 groups and artificially inseminated on the 17th or 28th March (Group1) and the 18th March (Group 2). One week after the AI program each group was run with 4 “backup” rams up until the 1st May 2008 (6 week period). All ewes were scanned 4th June 2008.

 

Age at Mating  11 months %  10 months  % 9 Months % Total %
 Mated (Group 1) 30       166   196  
 Pregnant 25       144   169  86%
 Dry  5        22   27  14%
                 
 Mated (Group 2)  50   18   43   111  
 Pregnant  39   15   30    84 76%
 Dry  11   3   13    27  24%
                 
 Mated (Total)  80    18    209   307  
 Pregnant  64  80%  15 83%  174 83% 253 82%
 Dry  16  20%  3  17%  35 17% 54  18%

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