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09/12/2021 5:43 pm
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Not all copulations lead to pregnancy. Give reason.
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09/12/2021 5:45 pm
- The sperm and ovum must reach the ampullary-isthmic junction at the same time, if fertilisation has to occur.
- If the sperms and the ovum are not transported simultaneously to the site of fertilisation, no fertilisation occurs, though copulation has occurred.