Embryo measurements dating
If the sex chromosome option is ordered, results will be reported as either low or high probability.If gender is requested this will be labelled as male or female.
When there are sufficient numbers of dividing cells the specimen is removed from the incubator and the placental cells are split open with an enzyme.The individual bands of each chromosome are examined in detail for subtle genetic abnormalities such as 1) insertion of genetic material into a chromosome , 2) deletion of genetic material from a chromosome and 3) exchanging of genetic material between chromosomes (translocation).This test excludes not only Down syndrome, but a wide variety of subtle and major chromosome abnormalities What is to be expected after the test?Sydney Ultrasound For Women understands that our patients have unique needs, and we tailor our care to each individual.We have a range of services provided by our expert team of sonologists, sonographers and genetic counsellors who use state of the art ultrasound technology.Warning signs of miscarriage include strong regular period like pains with fresh red bleeding. An ultrasound examination is first performed to a) confirm the dates, b) to assess the position of the placenta, and c) assess the baby for ultrasound signs of chromosomal abnormality such as Down Syndrome.
The time when miscarriage is most likely to occur is the first 24-48 hrs after the test. The test is performed at the ultrasound clinic by an Obstetrician Gynaecologist Sonologist (specialist ultrasound doctor).
The individual chromosomes are counted and analysed. As every pair is analysed, the results not only indicate the presence or absence of an extra chromosome number 21(Down Syndrome), but excludes chromosome abnormalities in the other 22 chromosome pairs.
In addition, each chromosome pair is stained with a special dye and examined under ultraviolet light.
The test is performed at the ultrasound clinic by an Obstetrician Gynaecologist Sonologist (specialist ultrasound doctor).
The skin of the lower abdominal wall is cleansed with an antiseptic alcohol based solution.
The amniocentesis needle is then guided into the amniotic fluid by tracking it’s course on the ultrasound screen.