Friday, Aug. 30, 2012
Kyodo
Several
Japanese hospitals next month will start using a new prenatal blood test that
can detect Down syndrome with an accuracy of more than 99 percent, hospital
officials said Wednesday.
The
National Center for Child Health and Development, Showa University Hospital and
other medical facilities will use the new method, developed in the United
States, to detect three types of chromosomal abnormalities in fetuses,
including Down syndrome, by analyzing the DNA of pregnant women 35 or older,
who face a higher risk of bearing children with chromosomal irregularities.
The new prenatal
test is less risky than existing amniotic fluid tests, in which a thin needle
is inserted into the abdomen, presenting a 0.3 percent higher risk of
miscarriage.
The safer
test is expected to raise the overall testing rate and possibly lead to an increase
in abortions.
The
hospitals aim to conduct the blood test on about 1,000 women over two years as
part of their research. They will examine whether the new method helps the
women refrain from undergoing amniocentesis, which will be unnecessary for those
who test negative.
The blood
examination will not be covered by health insurance and will cost ¥210,000.
Those who have reached the 10th week of pregnancy or beyond are eligible,
allowing women to be tested in the early stages of pregnancy, unlike amniocentesis,
which must be carried out between the 15th and 18th week of pregnancy.
The
national center said it is planning to draw up guidelines for conducting the
prenatal blood test, which will involve the presence of several experts, at
least 30 minutes of counseling and continued monitoring.
Haruhiko
Sago, chief of the facility's prenatal center, said it is "essential to
provide women with enough counseling so they do not undergo the test without
careful consideration."
Sago also
said the new method is already being used in Europe and the U.S. and that it is
just a matter of time until Japan adopts it as well.
Kunio
Tamai, chief director of the Japan Down Syndrome Society, said his organization
is strongly opposed to jumping on the bandwagon from a bioethics standpoint and
called for obtaining informed consent from parents-to-be.
http://www.japantimes.co.jp/text/nn20120831a2.html
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