B4.5.3.6

The use of hormones to treat infertility (HT only)

Content

  • Students should be able to explain the use of hormones in modern reproductive technologies to treat infertility.

This includes giving FSH and LH in a ‘fertility drug’ to a woman. She may then become pregnant in the normal way.

In Vitro Fertilisation (IVF) treatment.

  • IVF involves giving a mother FSH and LH to stimulate the maturation of several eggs.
  • The eggs are collected from the mother and fertilised by sperm from the father in the laboratory.
  • The fertilised eggs develop into embryos.
  • At the stage when they are tiny balls of cells, one or two embryos are inserted into the mother’s uterus (womb).
  • Although fertility treatment gives a woman the chance to have a baby of her own:
    • it is very emotionally and physically stressful
    • the success rates are not high
    • it can lead to multiple births which are a risk to both the babies and the mother.

Give examples to show how scientific methods and theories have changed over time. Explain, with an example, why new data from experiments or observations led to changes in models or theories. Decide whether or not given data supports a particular theory. ,

Explain why data is needed to answer scientific questions, and why it may be uncertain, incomplete or not available. Outline a simple ethical argument about the rights and wrongs of a new technology.,

Describe and explain specified examples of the technological applications of science. Describe and evaluate, with the help of data, methods that can be used to tackle problems caused by human impacts on the environment.