Irwin C F
J Reprod Fertil Suppl. 1975 Oct(23):485-8.
A total of 487 Standardbred and Thoroughbred mares at two studs were manually tested for pregnancy at 20 to 24, 30 to 34, and greater than 42 days after service and the abortion rate compared to that obtained in previous years when only the greater than 42-day test was performed. The results indicated that early manual pregnancy testing does not increase the abortion rate if undertaken carefully and enables non-pregnant mares to be re-mated earlier in the same season.
在两个种马场，对总共487匹标准赛马和纯种母马在配种后20至24天、30至34天以及超过42天时进行了人工妊娠检测，并将流产率与前几年仅进行超过42天检测时的情况进行了比较。结果表明，如果操作仔细，早期人工妊娠检测不会增加流产率，并且能使未怀孕的母马在同一季节更早地再次配种。
