In addition to traditional urine and blood tests on 17th week of pregnancy the expectant mother can be offered to carry out a screening of the second trimester – the triple test. Screening research is needed to identify abnormalities and chromosomal abnormalities in the future mother and baby. It will be necessary to take a blood test from a vein, by which you can assess the level of alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), and unconjugated estriol (NE) in a woman’s body, as well as to make ultrasound examination.
If the results of analyzes show that levels of these substances deviate from the normal, your doctor may suspect chromosomal abnormalities of the fetus and assign to carry out the amniotsentoza – further study of amniotic fluid.
During the ultrasound examination on 17th weeks of pregnancy the expectant mother is already able to find out the sex of their baby under the condition that he does not turn the screen back. Also, a doctor will check whether the size of the baby and the uterus is apropriate and whether there are no abnormalities in the development of a fetal heart rate, physical activity and the condition of uterine myometrium and amniotic fluid.