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.
No, it's not true! You can get pregnant before you have your first period, and many unplanned pregnancies happen just that way. To prevent pregnancy after you have your baby, you have to use birth control every time â even if you're breastfeeding. You're fertile around the time you ovulate, and you ovulate before you get your period, which can be anywhere from seven to 19 days before if you have a 28-day cycle, for example. You can get your period again from a month to over a year after having a baby.