Each of these children began his or her life as a frozen embryo that was created for in vitro fertilization.
所有的这些孩子在生命的初期都曾是为人工授精而创造出的一个冷冻的胚胎。
Meantime, the concrete measures were elicited for bull selection, making and preservation of frozen semen, mating methods and frozen embryo pool establishment etc.
同时，从种牛选择，冻精制作与保存、选配方法、建立冷冻胚胎库等方面提出了具体技术措施。
Boveine embryo freezing and transfer technologies were studied in this paper. We found out a comprehensive technique improving bovine frozen embryo survival rate and transfer pregnancy rate.
本文进行了牛胚胎冷冻与移植受胎技术研究，摸索出了提高牛冷冻胚胎成活率和移植受胎率的综合配套技术。
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