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Special
Laboratory Techniques
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ICSI
Introduction
to ICSI:
This
technique was developed in Brussels, Belgium at the Center for Reproductive
Medicine in 1991. ICSI involves the injection of a single sperm
directly into the cytoplasm of the oocyte (egg) using a technique
called micromanipulation. This technique has revolutionized the
treatment of male infertility. It is useful to treat sperm that
has: low count, low motility, high anti-sperm antibodies or abnormal
morphology. In the case of testicular obstruction (ie: vasectomy),
the fragile sperm are aspirated from the testes by the urologist
(in our office) and then the ICSI procedure is performed by the
embryologist to fertilize the oocytes.
In
1994 the Cooper Center for IVF was credited with the first ICSI
pregnancy in the Delaware Valley and they were triplets! Currently,
approximately 40% of all egg retrievals performed at the Cooper
Center for IVF utilize the ICSI technique. Careful follow up of
all pregnancies are done and to date the rate of birth defects appears
to be no higher than in naturally conceived children. It has been
noted that for men that have extremely low sperm counts they may
have a condition known as micro-deletion of the y-chromosome. This
is a genetic condition that can account for why these men have a
very low sperm count. This condition (micro-deletion of the y-chromosome)
can be genetically passed down to the male offspring of this specific
group of men. It has been shown that men with a condition called
congenital absence of the vas deferens have a higher incidence of
carrying the gene for cystic fibrosis. Prior to therapy, the couple
should have genetic testing done for cystic fibrosis.
Candidates
for ICSI:
ICSI is useful for patients suffering from male factor infertility,
which includes low count, low motility, abnormal sperm, high anti-sperm
antibodies, or poor fertilization by conventional insemination in
past cycles. ICSI requires very few total motile sperm, so even
males with severe male factor infertility have a chance at producing
a genetically related child. If there is an obstruction in the sperm
ducts, a successful pregnancy can be achieved by collecting the
fragile sperm from within the sperm duct behind the obstruction
or from a testicular biopsy. Aspiration of the sperm from the testes
is usually performed at the Cooper Center for IVF the same day as
the eggs are retrieved.
Return
to In-Vitro Fertilization
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