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.
1 The sound of a Doppler baby heartbeatâ¦. 2  Two Hearts in One Body: The Heartbeat of a Fetus Knowing your baby's fetal heart rate helps determine if your baby is developing healthily. 3  Understanding the average fetus heartbeat is a great tool to compare your baby's heâ¦.