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.
This are definitive and true signs of pregnancy. 1. Fetal Heart Rate Doppler reveals heart beat at 10th weeks of gestation. Fetoscope reveals heart beat at 16th weeks of gestation. Sthetoscope reveals heart sound at 18th to 20th weeks of gestation by auscultation. 2.