Studies on the Transplantation of Ova (Artificial Pregnancy) in Goats. IV

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Abstract
Daily injection of 10mg of progesterone with a view to synchronizing the age of ova in days, suppressed estrus as long as injection was continued. In most cases, estrus recurred on the 2nd day after the last injection. The duration of estrus was 1.5 to 3 days in such cases. One each of four ova (at the 2- and 8-cell stages) recovered from two donors was transplanted, 10 to 30 minutes after recovery, into four recipients whose sexual cycle had been synchronized. Transfers of a 2-cell ovum and an 8-cell one resulted in successful production of normal kids. In an experiment, ova were stored in a mixture of equal amounts of goat blood serum and Ringer solution for varying periods of time. One transfer of four of such ova that had been stored for about 24 hours was of success, and three normal kids were produced.