What happens during pregnancy When a lady is pregnant, she might feel faint daily, feel vomiting even after eating healthy food and then she looks at the doctor, who says that she is going to become a mother. Things to Do During Pregnancy  Consume folic acid and vitamin D supplements: Folic acid decreases the chances of defects in the central nervous system in babies. A pregnant woman should consume 400 micrograms of folic acid as an addition as soon as she decides to have a baby. If a woman is suffering from diabetes or epilepsy, she should consume 5mg doses of folic acid.