Question

In the human female reproductive system, state the changes that take place once fertilisation has taken place. Write the role of the placenta in this process.

Answer 1

1. Fertilisation: In the fallopian tube, the sperm fertilizes the egg.
2. Zygote Formation: A blastocyst is created when the fertilized egg (zygote) divides its cells.
3. Implantation: The endometrium, or uterus lining, is where the blastocyst implants.
4. Placenta Formation: The placenta forms to facilitate the transfer of waste products from the foetus to the mother as well as the exchange of nutrients and oxygen between the mother and foetus.
5. Hormonal changes: Hormones like hCG are released by the body to sustain pregnancy and stop menstruation.