At 6 weeks pregnant, signs of pregnancy usually begin to appear and often cause discomfort. Generally at this time, some pregnant women will feel nausea, fatigue, and emotional instability. Although physically not so visible, pregnant women 6 weeks began to feel various kinds of changes in the body. Changes that occur during pregnancy are normal and are experienced by all pregnant women. Changes in the Body of a Pregnant Woman 6 Weeks In general, here are some common 6-week signs of pregnancy: Fatigue Fatigue is a common thing experienced by pregnant women 6 weeks or during the first trimester of pregnancy. This is due to changes in pregnancy hormones, one of which is high levels of progesterone in the body. If you start to feel tired, hurry to rest. Nausea In early pregnancy, nearly 70 percent of pregnant women experience nausea. This condition, known as morning sickness, is caused by the production of the human chorionic gonadotropin (HCG) hormone and also high levels of ...