How can you know you are pregnant: First, the appearance of delayed or stopped menstruation, this is the first symptom that pregnant women can directly observe, other symptoms usually appear after the 6th week, delayed menstruation appears within the first month of pregnancy. Second, nausea, vomiting, if there is nausea, vomiting, there is a general possibility of pregnancy, nausea, vomiting usually begins to appear after the 6th week of pregnancy, pregnancy reaction is very obvious pregnant women, after the appearance of nausea, vomiting, and even reach the situation of eating what vomit, so during this period of time must pay attention to diet and nutritional supplements. Third, fatigue, pregnant women are prone to fatigue and drowsiness after pregnancy, this period should try to rest in bed, pay attention not to overwork. Fourth, the breasts become larger, easy to sensitive, the female body during this time because of hormonal reasons, the breasts will become larger, like the feeling of breast enlargement, and the breasts also become sensitive. Five, you can go to the hospital for blood test and B-type ultrasound, if you are pregnant, the doctor will inform.