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View pictures in App save up to 80% data. Twins are two or more offsprings that are produced by the same pregnancy. There are two types of twins, identical and fraternal twins. Identical twins develop from one fertilized egg that splits in two and develops into two babies. It mostly happens by chance and the identical twins look exactly the same and share the exact same genes.
Fraternal twins develop from two separate eggs that are fertilized by two separate sperms. Fraternal twins might not look the same and they might have different sex.
Formation of twins can happen at different times, between one to six days. Conceiving twins is determined by the mother and not the father. Carrying a multiple pregnancy has a common risk of preterm delivery and higher chances of the mother suffering high blood pressure.
Most twins are delivered at 36 weeks instead of 39 to 40 weeks that's considered full term. Twin's most common position in the womb is with both babies lying in a vertical position. With most twins, the head of the first baby is down while the second twin's head my face down or may lie across the uterus. View pictures in App save up to 80% data.
Studies suggest that twins know they are together in the womb. They start interacting as early as week 14. Twins are aware of their counter parts and they respond to them in special ways