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प्रश्न
Why not all copulations lead to fertilization and pregnancy?
लघु उत्तर
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उत्तर
Not all copulations lead to fertilization and pregnancy because fertilization requires the ovum and sperm to be transported simultaneously to the ampullary-isthmic junction of the fallopian tube. If this simultaneous transport does not occur, fertilization cannot happen, thereby preventing pregnancy. This is why many copulations do not result in fertilization and pregnancy.
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