In Vitro Fertilisation also known as the “Test-tube
baby” technique, is where the egg is fertilised outside
the body and the embryo(s) are introduced back into the woman’s
uterus. IVF is typically suitable for several groups of patients,
such as:
- Couples in which the woman has blocked or
damaged Fallopian tubes.
- Women with endometriosis or ovarian disorders.
- Men with abnormal semen parameters.
- Couples with unexplained infertility.
The woman is given fertility drugs to stimulate
her ovaries and the development of several mature follicles.
Each of these follicles may contain an egg. The recruitment
and development of the follicles is regularly monitored by
ultrasound scans and blood tests. This is to ensure that the
ovarian stimulation is both safe and effective.
Once mature follicles have been produced the
eggs are collected using an ultrasound-guided needle through
the vaginal wall and into the ovary. This procedure is performed
under sedation/local anaesthetic. The collected eggs are then
placed into culture in the embryology laboratory.
The male partner produces a semen sample on
the same day, which is also prepared in the laboratory. The
aim of the preparation process is to harvest a good number
of motile, normal looking sperm. Measured amounts of the prepared
sperm are then cultured, overnight, with the eggs.
Next morning the eggs are inspected for signs
of fertilisation. Those eggs that have normal fertilisation
are cultured in the laboratory for another 24 – 48 hours.
The development of the embryos is monitored and the patients
are kept advised of their progress.
Our Fertility Specialist performs the embryo
transfer procedure. The selected embryos are introduced, through
a fine catheter, into the woman’s uterus. Typically
2-3 embryos are transferred, depending on the patient’s
circumstances. The embryo transfer procedure takes no more
than half an hour and few women experience any discomfort.
The spare embryos are then assessed in terms
of their suitability to be cryopreserved for use, by the couple,
in future cycles.
The success rate for IVF is typically 25 –
30 % per treatment cycle. However, the success rate is dependant
on many factors, such as the age of the woman.