Intracytoplasmic sperm injection,
or ICSI, is a form of in vitro fertilization
in which fertilization occurs outside of the
body. First, egg cells are harvested and transferred
to a special media in a laboratory dish. Within
a few hours, a single sperm is injected through
a fine needle into the center of an egg cell
to aid in the process of fertilization. If successful,
the cell will divide and form the beginning stages
of an embryo.
If necessary, the DNA of a single
cell from an embryo may be checked to ensure
that various genetic disorders are not present.
Typically, several egg cells are harvested
and fertilized at the same time then inserted
back into the uterus to increase the chances
that one will implant and develop into a successful
pregnancy.
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