We often see celebrities promoting
pregnancy test kits on T.V. But do you know what these pregnancy tests are and
how they work? Pregnancy tests help in determining if a woman is pregnant or
not and are considered 97% accurate. Let's find out the chemical activity
involved.
Pregnancy test kits are self-determining
diagnostic kits that help in determining if a woman is pregnant or not. It
consists of the immunoassay strip, which is formed by
compressing non-woven fibers into a narrow strip, which is then coated with
reactive antibodies. These antibodies combine with the pregnancy hormone
in a series of steps and ultimately results in a colour change indicating
whether or not the woman is pregnant.
The test kit also has an absorbent pad
that extends from the test chamber and is used to contact the urine stream. The
pad absorbs the liquid and draws it into contact with the immunoassay strip.
Both the test strip and absorbent pad are
placed within a two-piece housing that allows the unit to be handheld and also
protects the strip from environmental contaminants. A leak-proof, clear plastic
window on the side of the housing prevents the urine from accidentally
splashing on the test strip and also allows the test and control zone portions
of the strip to be viewed.
There is also a plastic collection cup,
which is included with test kits that require collection of urine in a separate
step. They may also include plastic vials with pre-measured amounts of reagents
that must be mixed with the urine before application to the test strip.
CAN you now answer the questions:
What is pregnancy?
What are pregnancy test kits made for?
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