Coordination and control - The endocrine system - OCR Gateway Reproductive technologies- infertility hormones

The endocrine system secretes hormones into the bloodstream from glands throughout the body. Hormones produce an effect on specific target organs in the body.

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Hormones used in reproductive technology to treat infertility – Higher

Some couples have difficulty conceiving children and this can be caused by a number of factors. The man might have a lower than average number of sperm in his semen, or the sperm may not be very mobile. Some women don’t produce enough FSH to allow their eggs to mature.

Fertility treatments

Fertility drugs contain and , which stimulate eggs to mature in the ovaries. This treatment increases the woman’s chance of becoming pregnant, although the treatment may not always work. Because the treatment boosts the production of mature eggs, it increases the chance of twins or triplets. Multiple pregnancies carry a higher risk of complications, and may lead to premature or underweight babies.

In vitro fertilisation (IVF) treatment

An egg fertilised with sperm during IVF treatment

If a couple are having difficulty conceiving a child because there are issues with the quality of the man's sperm, or a woman has blocked oviducts, then can be used.

  • 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 a dish 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).

The development of microscopy techniques have allowed IVF treatments to be developed further.