Pregnancy means pregnancy. The sperm and the egg meet in the fallopian tube and are fertilized to form a fertilized egg. The fertilized egg slowly moves into the uterine cavity with the help of the fallopian tube cilia and slowly buries itself in the uterine lining. It takes about a week for the fertilized egg to successfully implant in the uterus and begin to secrete a large amount of human chorionic gonadotropin. At this point, a blood test is taken to determine the level of chorionic gonadotropin and to confirm pregnancy, which is commonly referred to as pregnancy. As the chorionic gonadotropin level rises, pregnancy reactions begin to appear, manifesting as nausea, vomiting, drowsiness, and fatigue. Generally, the symptoms will be relieved or disappear in the third trimester of pregnancy. It is recommended to pay attention to rest, avoid straining, eat a reasonable diet and have regular pregnancy tests after pregnancy.