Semen Evaluation. Stallion AI Services performs tests on all semen collected at the centre to make sure only the best quality semen is used for AI. More indepth evaluations are also carried out on frozen semen and this service is also available for stallion owners wishing to know the quality of their stallionsâ semen.
Ultrasound is one of the screening tests that may be done in the first trimester to look for birth defects, such as Down syndrome. The first-trimester screening test uses ultrasound to measure the thickness of the skin at the back of the baby's neck.
Screening tests can identify babies at higher risk for a few problems in addition to Down syndrome. First-trimester combined screening can detect trisomy 18 and trisomy 13. An abnormal NT scan result can also indicate certain birth defects, such as major congenital heart problems and abdominal wall defects.