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.
An NT scan can't tell you for certain whether or not your baby is affected. What it can do is help you to decide whether or not to have a diagnostic test. This ultrasound scan must take place at between 11 weeks and 13 weeks plus six days of pregnancy, or when your baby is between 45mm and 84mm.n NT scan can't tell you for certain whether or not your baby is affected. What it can do is help you to decide whether or not to have a diagnostic test. This ultrasound scan must take place at between 11 weeks and 13 weeks plus six days of pregnancy, or when your baby is between 45mm and 84mm.