Why in some cases twin born? How ?

1.	Why in some cases twin born? How ?
Answer» As reported in the International Journal of Fertility, only about one in eight embryos that starts as a twin is born as a twin. If they do survive, twins are usually born healthy. However, they are still more likely than other babies to have birth defects or to be born prematurely or underweight लूला में दम नही था

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