Level 1: What is pregnancy? Pregnancy is the process in which a fertilized egg implants in a woman\’s body and develops into a fetus. Pregnancy is usually caused by sexual intercourse, when a man\’s sperm combines with a woman\’s egg to form a fertilized egg, which then moves to implant in the uterus over several days. If you are pregnant, you may experience some early pregnancy symptoms, including breast tenderness, nausea, vomiting, dizziness, etc. But these symptoms don\’t always occur because everyone is different. If you want to confirm whether you are pregnant, it is best to go to the hospital for a checkup. Level 2: How to conduct self-test? If you want to test whether you are pregnant yourself, you can