Quirke J F, Hanrahan J P
J Reprod Fertil. 1983 Jul;68(2):289-94. doi: 10.1530/jrf.0.0680289.
Fertilized eggs, obtained from mature donor ewes, were transferred into the uteri of adult ewes and ewe lambs (1 or 2 eggs per recipient). The survival rate to term of the transferred eggs was similar in the two classes of recipients. The percentage of adult ewe and ewe lamb recipients which gave birth to twins was 45.3 and 41.1 respectively. Gestation length was shorter (P less than 0.01) and lamb birth weight lower (P less than 0.01) for ewe lamb recipients. The results indicate that the generally lower lambing rate of ewe lambs compared to adults is unlikely to be due to unfavourable uterine conditions.
从成年供体母羊获取的受精卵被移植到成年母羊和母羊羔羊的子宫内（每个受体植入1或2枚卵）。两类受体中移植卵的足月成活率相似。产下双胞胎的成年母羊受体和母羊羔羊受体的百分比分别为45.3%和41.1%。母羊羔羊受体的妊娠期较短（P<0.01），羔羊出生体重较低（P<0.01）。结果表明，与成年母羊相比，母羊羔羊的产羔率普遍较低，这不太可能是由于子宫条件不利所致。
