2Scroll Compressor History and Development 2OPERATING PRINCIPLES................................ 3Geometry of a Scroll....................................... 3The Scroll Set ................................................. 3Compression Process ...................................... 4Compliance .....................................................
A: Your baby's heartbeat is one of the first things your doctor will look for on an ultrasound, a test that uses sound waves to give off visual images of your baby and placenta as well as your uterus and other pelvic organs.
So be open-minded about using your babyâs heart rate as a means of predicting its gender. The only sure way to know what a babyâs gender is is to wait and see when it is born. Even ultrasound does not offer a 100% guarantee of gender.