Amniocentesis Prior to 1980
نویسنده
چکیده
The extraembryonic membranes [5] that surround and originate from the embryos of vertebrates such as birds [6], reptiles, and mammals are crucial to their development. They are integral to increasing the surface area of the uterus [7], forming the chorion [8] (which in turn produces the placenta [9]) and the amnion [10], respectively. The amnion [10] will ultimately surround the embryo in a fluid-filled amniotic cavity. This amniotic fluid, which cushions and protects the fetus [11] and helps prevent the onset of labor, is sampled in amniocentesis to screen for genetic diseases.
منابع مشابه
Pericentric inversion (13) with two different recombinants in the same family.
A family is described in which a pericentric inversion (13) was discovered in the father after the birth of an abnormal baby. In a further pregnancy amniocentesis was carried out. The fetal karyotype showed a rec(13)dup p,inv(13)(p11q22). The fetus's abnormalities were similar to those observed in the first child. Family studies showed that a first cousin, mentally retarded, had a rec(13)dup q,...
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The decision to have an amniocentesis entails a trade-off between a risk of procedure associated miscarriage and the benefit of obtaining diagnostic information to identify Down syndrome or other chromosomal aneuploidy. Ideally, this trade-off is informed by first and second trimester pre-natal screening tests, such that women with low risk screening test results are not encouraged to have an a...
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