Hi west life,
hope the below article helps.
Ovulation Induction by Gonadotrophins (OIG)
In a natural cycle, only one egg develops. As in a fertility treatment, to increase the chances of being successful, daily hormone injections are given to make several eggs develop in the ovaries. Each egg develops in a little sac called a follicle. The hormone is scientifically known as gonadotrophins but is marketed under various names such as Gonal-F, Puregon, Pergonal and Humegon.
The development and growth of the follicles is monitored by ultrasound scanning of the ovaries and blood tests to measure the female hormone levels. When the follicles have reached their target size, a further single hormone injection is given to induce the final maturation of the eggs. The final maturation of the eggs takes place about 36 hours after this injection. This hormone is scientifically known as HCG and is marketed as Profasi or Pregnyl.
Intra Uterine Insemination (IUI)
IUI is a process when a quantity of washed and concentrated sperm is introduced into the wife's womb. This is done during the time when eggs are released from the ovaries (ovulation) in order to increase the chance of pregnancy. The best IUI results can be achieved when insemination is coupled with ovulation induced by fertility hormones. This treatment is suitable for a female who has no obvious fertility problems and a male who has reasonable sperm numbers, movement and shape.
In-Vitro Fertilisation (IVF)This treatment is commonly referred to as the 'test-tube baby' program. It has helped many childless couples conceive after the first test-tube baby was born in 1977. IVF involves the removal of eggs (egg recovery) from the ovaries of the wife and mixing the husband's sperm (insemination) with the eggs outside the body in the laboratory.
The objective of this procedure is to allow one sperm to enter one egg to produce an embryo. One to three embryos will then be placed into the wife's womb (uterus), usually two to three days later. This step is called embryo transfer, or ET. These embryos will then attach or implant themselves to the inner lining of the uterus (endometrium) and develop into one to three babies.
Intra Cytoplasmic Sperm Injection (ICSI)
ICSI is a process when a single sperm in injected directly into the centre of an egg to assist in fertilisation. After fertilisation, the fertilised eggs (embryos) are monitored for a few days before they are transferred back to the womb. ICSI is recommended for patients with low sperm number and/or poor sperm quality or have difficulties with fertilisation in the past.