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.
While an ultrasound is the best method for detecting twins, there are other symptoms that can, in the absence of an ultrasound, suggest twins. They include: â Doppler Heartbeat Count.A Doppler system amplifies fetal heartbeat sounds, which can be distinguished late in your first trimester.hile an ultrasound is the best method for detecting twins, there are other symptoms that can, in the absence of an ultrasound, suggest twins. They include: â Doppler Heartbeat Count.