Twins are two people who have shared the same womb at the same time. They may also have come from the same egg. Twin births are becoming more and more common due to several factors such as increasing use of fertility treatments, child births at an older age, and even genetic factors. Women who are slightly above-average in build are also likely to have multiple births or twins. Certain ethnic groups are also found to have a greater twin population. One in every 250 births in the world could be an identical twin birth.
Identical twins are also known as monozygotic twins. They are from a single egg that forms a single zygote that splits into two embryos. Two fetuses emerge from the two embryos in the same womb. The exact reason for this splitting hasnt been identified yet. Sometimes, identical twins also share the same amniotic fluid, making them monoamniotic. Otherwise, they are diamniotic. Twins sharing the same placenta are monochorionic. Those who dont are dichorionic. This happens only in the case of identical twins. All monoamniotic twins are also monochorionic. This depends on the stage at which the zygote divides. Twinning at the earliest stages would result in...
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