Answers

2015-06-06T09:27:16+08:00
Identical twins occur when a single embryo, created by the union of a sperm and an egg, divides into two embryos.

that all hehehe

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2015-06-08T18:36:48+08:00
There is/are also possibilities that a woman can ovulate not just once or twice or more because of such hormonal tendencies (an increase in estrogen or progesterone) which causes multiple pregnancies. The ovum and the sperm (when matched and united) now forms a new life.
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