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Gynaecology & Obstetrics General 737695b8

A patient delivers a twin gestation in which one infant has blood group O and one has blood group B. The patient and her husband are both type O. Discordant blood types is explained by

A
It involves fertilization of one ovum that splits into two during the same menstrual cycle.
B
It involves fertilization of two ova within same menstrual cycle, but not at the same coitus.
C
It involves fertilization of two ova separated in time by an interval as long as or longer than a menstrual cycle.
D
This does not occur spontaneously in humans.
High-Yield Explanation
The clinical Scenario describes suferfecundation.
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