Carbon dioxide is a pure substance. A pure substance can be an element or a compound. Carbon dioxide is a pure compound, consisting of two kinds of atoms that are bonded together. An element consists of merely one kind of atom. For example, oxygen is an element.
For Downâs syndrome, a blood test called the quadruple test is available from weeks 14-20 of pregnancy. For Patauâs and Edwardsâ syndromes, you will be offered a mid-pregnancy scan that checks for physical abnormalities.
Effects of Stress During Pregnancy. Stress can be felt in a complicated pregnancy and even in an uncomplicated one. It is a very common side effect of life. But it can be quite harmful during a womanâs pregnancy hence it is essential that pregnant women reduce their anxiety and stress levels. Stress is known to have many side effects especially during the pregnancy. Studies have indicated that higher levels of stress can cause a personâs heart rate to accelerate, can increase blood pressure levels. Stress during pregnancy effects can be a big contributor to the increased chances of a premature delivery.