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Jan
Having twins, triplets, and four or more babies (high-order pregnancy) is called multiple pregnancy; if there are more than a single egg that has been released during the menstrual cycle, and all of these have been fertilized by a sperm, more than one embryo may possibly embed and grow in the uterus. This kind of pregnancy usually results in fraternal twins, and when one fertilized egg separates, it will result in multiple and identical embryos. Furthermore, this type of pregnancy will also result in identical twins which are less common compared to fraternal twins.