Why all copulations do not lead to fertilisation and pregnancy?
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→ During copulation (coitus) semen is released by the penis into the vagina (insemination).
→ The motile sperms swim rapidly, pass through the cervix, enter into the uterus and finally reach the ampullary region of the fallopian tube.
→ The ovum released by the ovary is also transported to the ampullary region where fertilisation takes place.
→ Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region. This is the reason why not all copulations lead to fertilisation and pregnancy.
→ The motile sperms swim rapidly, pass through the cervix, enter into the uterus and finally reach the ampullary region of the fallopian tube.
→ The ovum released by the ovary is also transported to the ampullary region where fertilisation takes place.
→ Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region. This is the reason why not all copulations lead to fertilisation and pregnancy.
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