If a woman is already pregnant and becomes pregnant again, then this condition is called superfetation. Superfetation occurs when a second pregnancy occurs during an existing pregnancy. This occurs when a second egg occurs a few days or weeks after the first egg has been fertilized and implanted in the uterus. Superfetation is extremely rare in humans. This has been confirmed in only a few cases in medical history. For example, such things are common in other animals like fish, rabbit and badger. Why does superfetation occur? Children born from…
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