In the early stages of pregnancy, HCG doubles every other day. If it reaches about 10 weeks of pregnancy, HCG does not rise as fast and does not double every other day. If the HCG growth slows down after the tenth week of pregnancy, this is clinically normal and ultrasound is recommended to understand the development of the embryo. In the vast majority of cases, the primitive heart tube pulsation will be seen by ultrasound after the seventh week of pregnancy. It is recommended to go to the hospital for regular maternity checkups after pregnancy, and to build a maternity health card in the third trimester.