Hershman L, Douglas R H
J Reprod Fertil Suppl. 1979(27):395-401.
Two experiments were performed to deterine the critical time at which the equine blastocyst must be present within the uterus of the mare to prevent regression of the corpus luteum, and thus establish the critical time for the maternal recognition of pregnancy. A non-surgical blastocyst collection technique was developed to study this relationship between the blastocyst and the maternal ovary. Results from these experiments demonstrated that the cyclic life-span of the corpus luteum is not affected by the presence of the blastocyst within the mare's uterus until after Day 14 after ovulation. Luteal function was prolonged when blastocysts were removed on Day 15 or later. The critical period for the maternal recognition of pregnancy in the Pony mare appears to be confined to the period between Days 14 and 16 after ovulation.
进行了两项实验，以确定马囊胚必须在母马子宫内出现的关键时间，以防止黄体退化，从而确定母体识别妊娠的关键时间。开发了一种非手术性囊胚采集技术来研究囊胚与母体卵巢之间的这种关系。这些实验的结果表明，直到排卵后第14天之后，黄体的周期性寿命才会受到母马子宫内囊胚存在与否的影响。在第15天或更晚移除囊胚时，黄体功能会延长。母马识别妊娠的关键时期似乎局限于排卵后第14天至第16天之间。
