2, Blastocyst formation and implantation e 6 s 1雌原核与雄原核形成2雌原核与雄原核靠近3.核融合开始卵裂 1.2细胞期 5.J细胞期 6,8细胞期 桑棋胚 x,早期乐泡 9.胚泡
2. Blastocyst formation and implantation
cleavage and blastocyst formation ① cleavage blastomere: cells formed by cleavage 30h:2 /40h:4 /72h:12-16- morula
1) cleavage and blastocyst formation ①cleavage ---blastomere: cells formed by cleavage /30h: 2 /40h: 4 /72h: 12-16- morula
正在退化的透明带 极端滋养层 内细胞群 胚泡腔 滋养层 早期胚泡 晚期胚泡 ② formation of blastocyst:by、5day blastomere reach to 107, small space appear between them ---blastocoele: filled with liquid trophoblast ---inner cell mass --=polar trophoblast
②formation of blastocyst: by 5 th day, blastomere reach to 107, small space appear between them ---blastocoele: filled with liquid ---trophoblast ---inner cell mass ---polar trophoblast
4细胞2细胞 桑椹胚 第一次卵裂 受精 胚泡 排卵
2) Implantation definition: the process by which the blastocyst is embedded in endometrium time: 5th-6th day begin; 11th-12th day complete
2) Implantation ---definition: the process by which the blastocyst is embedded in endometrium ---time: 5 th –6 th day begin; 11th –12th day complete