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![Twins fetal development | Pregnancy images | BabyCenter](https://www.iarticlesnet.com/pub/img/site/s_05.jpeg)
Twins fetal development | Pregnancy images | BabyCenter
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日期:2024-07-12
Nonidentical twins like these (also known as dizygotic twins) are the most
common. Each baby grows from a separate fertilized egg (zygote). By 3 weeks
each ......看更多