这个改变是，不要像惯常操作那样，在胎儿出生后马上剪断连接胎儿与胎盘的脐带。
That change is not to cut the umbilical cord linking the child with the placenta straight after birth-as is standard practice.
瑞士的卡尔教授在意外中发现：母羊作为食草动物，生育后都有食用自己胎盘的现象。
Swiss professor Karl happened to find that as herbivorous animal, ewe eat placenta after delivering babies.
另外，将来有关单卵双胞胎原因更多的信息可以直接通过出生后核对胎盘和羊膜囊的数目来获得。
In addition, more information about the cause of monozygotic twins could be collected in the future by a straightforward check of the Numbers of placentas and sacs when the babies are born.
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