| Ovulation
Induction (OI)
The simplest form of fertility treatment designed
to help women who do not ovulate naturally, or who
ovulate infrequently. Medication is given to stimulate
egg production. Tablets and injections are given shortly
after the commencement of the period and the growth
of the follicle (bags of fluid which contain eggs)
are monitored by serial ultrasound scanning. Once
the follicles have reached the appropriate size, an
hCG injection is given to stimulate final egg maturation
and release of the eggs from the follicle. At this
time, the couple is advised natural intercourse.
Intra
uterine insemination (IUI or AIH)
Intra
uterine insemination or Artificial Insemination is
done using the husband’s sperm. Where no cause
of infertility is found i.e. unexplained infertility,
this treatment may be used. It can also be used in
situations, when semen quality is slightly sub optimal.
This is the simplest form of assisted conception treatment.
The ovaries are stimulated with tablets and Gonadotrophin
injections as described for Ovulation induction. At
the time of ovulation, the husband’s sperm is
prepared in the IVF laboratory and then gently placed
into the uterus. This procedure increases the chance
of pregnancy to about 19-22%. This treatment is appropriate
for couples where the husband’s semen has normal
parameters or mild abnormalities, and the wife has
open fallopian tubes.
Surgical
Sperm Retrieval Techniques
These are used when no sperm is found in the semen.
Two
techniques exist:
1. Percutaneous Epididymal Sperm Aspiration
(PESA)
If a blockage in the epididymis or congenital absence
of the vas deferens (the drainage tube for sperm from
the testis to the penis), is the cause for Azoospermia
(no sperm in the semen), then this procedure is indicated
for obtaining sperm.
A
very fine needle is inserted into the Epididymis (the
sperm collecting tube outside the testis) and sperms
are aspirated. This procedure is performed under local
anaesthesia, requires no incision, and the patient
can get back to work the same day.
2.
Testicular Sperm Aspiration (TeSA)
In some men, the production of sperms in the testis
is very low and no sperms are seen in the semen. TeSA
is a way of obtaining the few sperms that are available
in the testis. Using local anaesthesia, a needle is
inserted into the testis to obtain some tissue. This
tissue is carefully dissected in the laboratory and
the few sperms obtained may be used for ICSI or frozen
for later use.
Assisted
Reproductive Techniques (ART)
These are sophisticated laboratory based infertility
techniques for couples who require advanced treatment
to be able to conceive.
In
vitro Fertilization (IVF) or test tube baby treatment
When
a woman has blocked or damaged fallopian tubes, but
her husband’s sperm is healthy, IVF is the way
for her to conceive. The woman's ovaries are stimulated
by Gonadotrophin hormones in order to get the ovary
to develop more eggs. When the follicles containing
the eggs have developed adequately, the eggs (oocytes)
are collected and mixed with a sample of the husband’s
sperms. The mixture of eggs and sperms is incubated
in a suitable environment in the laboratory. The procedure
of egg collection involves a small operation (ultrasonographically
guided transvaginal oocyte retrieval) performed under
sedation on an outpatient basis. The operation is
virtually painless and the patient can go home approximately
four hours later. The eggs fertilize in the laboratory
and divide over 2-3 days. The resulting embryos are
then gently replaced into the uterus by a simple and
painless procedure. If the embryos implant into the
lining of the womb, a pregnancy occurs. This treatment
can also be used for couples with unexplained infertility.
Intra
Cytoplasmic sperm injection
When
the husband’s sperms have poor movement or the
count is very low, IVF will not work, as the sperms
will not be able to enter the eggs. In these situations,
ICSI is the only option. In this technique, each egg
is injected with a single sperm. If fertilization
and cleavage occur, the embryos are then replaced
into the uterus as in IVF. ICSI is the only treatment
for severe male factor infertility. In this procedure,
even sperm obtained by TeSA or PESA i.e. testicular
sperm or epididymal sperm can be used successfully.
This procedure has helped couples who in the past
had no hope of becoming parents.
Frozen
Embryo Replacement (FER)
When embryos are left over from the initial IVF/ICSI
procedure, the extra embryos can be frozen and transferred
during a subsequent natural cycle.
Assisted
Embryo Hatching
Where the shell covering the embryo is opened so as
to allow the embryo to hatch and implant easily. This
technique helps patients with repeated failure with
the IVF or ICSI technique, women over the age of 38
and women undergoing FER.
Blastocyst
Transfer
This involves the culture of embryos for 5 days in
the laboratory to a stage called Blastocyst. This
helps in the selection of embryos most likely to implant.
|