Carbon dioxide. Carbon dioxide (chemical formula CO2) is a colorless gas with a density about 60% higher than that of air (1.225 g/L) that is odorless at normally encountered concentrations. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms.
You should only do ballet in pregnancy if you are used to it. Ballet stretches can place a lot of pressure on your joints, especially your pelvic joints, and standing on one leg can cause pain in your pelvis.
Rest assured that flying while you are pregnant is almost always completely safe, so thereâs no need to change your travel plans. Who Can Fly. There are some restrictions as to just who should and should not travel the skies when they are pregnant. Generally, women who are having a healthy, normal pregnancy are free to come and go as they please. However, the American College of Obstetricians and Gynecologists (ACOG) recommends women donât fly after their 36th week of pregnancy.