There isn't a woman alive who, when she finds out she's pregnant, doesn't wonder if she might be carrying twins. Still it's always a shock when the doctor announces the presence of a second or third little fetus.
The most common type of twins are fraternal and occur when the mother's body releases two eggs instead of one. When both eggs are fertilized they develop into two genetically unique individuals who share the same womb. In one extraordinary case, a woman who was
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