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通常认为,“胚胎在母体子宫里发育的时间一般为280天左右”。这从科学性上来说是不够严密的,在教学中应学生说明: 1.胚胎发育是指从受精卵分裂开始到从母体里分娩出来这一发育时间。 2.从受精到分娩的实际时间(即胚胎在母体里的时间)大样是266天左右。 3.胚胎真正在母体子宫里发育的时间只有261天左右。 <讨论><1>人类女子排出的卵细胞的受精能力一般只有8小时左右(即在输卵管中
It is generally believed that “the time for the embryo to develop in the mother’s womb is generally about 280 days.” This is scientifically speaking, it is not strict enough. Students should explain in teaching: 1. Embryonic development refers to the development time from the division of the fertilized egg to the birth of the fertilized egg. 2. The actual time from fertilization to childbirth (ie, the time the embryo is in the mother) is about 266 days. 3. The embryo actually develops in the maternal uterus for only 261 days. <1>The fertilizing capacity of human female oocytes is generally only about 8 hours (ie in the fallopian tube)