Precautions and Care during Pregnancy: Pregnancy is a phase in woman's life during which multiple hormonal changes take place. Changes in hormone levels during pregnancy can generate a wide range of changes. Mood swings, food cravings, heartburn, swollen feet, morning sickness, sleeping a lot , weight gain, spotting and constipation are just a few of the changes. During pregnancy, you'll probably get advice from everybody. But staying healthy depends on you. Read about the ways to keep you and your baby healthy during pregnancy.