Techniques in embryo technology ( such as in vitro production of embryos and animal cloning ) need large quantities of high quality oocytes . but the quality of in vitro matured oocytes from slaughtered animals is generally lower than that of the in vivo matured oocytes . it is usually thought that the reason for this poor quality in in vitro matured oocytes is the lack of capacitation during the dominancy of follicular development in vivo 目前胚胎工程技术研究和开发(如体外生产胚胎和体细胞克隆等)需要大量高质量的成熟卵母细胞，但利用屠宰动物卵巢卵母细胞经过体外成熟培养而获取的卵母细胞质量还远不如体内成熟卵母细胞，其原因一般认为是由于缺乏体内主卵泡阶段的获能作用。
