Level 1: How long does it take to know you are pregnant for the first time? It is an exciting and nervous thing. Many expectant mothers want to know whether they are pregnant. Generally speaking, there will be some obvious signs in the first month after pregnancy, such as breast swelling and pain, nausea and vomiting, etc. At this time, you can use a pregnancy test stick or go to the hospital for a B-ultrasound examination to confirm whether you are pregnant. Level 2: Pregnancy test