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.
Pointe is dangerous work, but if at right age, strength, and proper care, dancers do it. Please do not let your child go en pointe until further ballet training and she is in her early teens. Source(s): Almost 16 years ballet 11 years en pointe.