Amniotic scan
An amniotic scan was a medical scan, performed on pregnant lifeforms. Among other information, the scan could reveal the gender of the unborn life.

In 2370, Alyssa Ogawa ran a preliminary amniotic scan on the pregnant Spot at Doctor Beverly Crusher's behest, as the doctor had to see to Reginald Barclay instead. ()

See also
 Amniotic fluid

de:Amnionmembranscan
Medical scans