The timing of pregnancy tests is decided according to the week of pregnancy: the first pregnancy test is usually done after menopause, when the early pregnancy test is positive, and at 5-6 weeks to confirm whether the pregnancy is intrauterine and exclude ectopic pregnancy. The second maternity test is at 12-16 weeks, mainly to check the pregnant woman and the fetus by the absence of fetal heart, the development of the fetus, and the need to do Down’s syndrome screening. The third check-up is at around 20-24 weeks, mainly to screen for combined gestational diabetes. The fourth maternity checkup is around 25-28 weeks to check if the pregnant woman has any infectious diseases such as hepatitis B. The fifth pregnancy test is around 29-32 weeks, mainly to observe the blood pressure of pregnant women and prevent eclampsia during pregnancy at an early stage. The sixth pregnancy test is done at 33-37 weeks, mainly to assess the fetal head circumference, biparietal diameter, amniotic fluid, and the mother’s birth canal to prepare for delivery. A minimum of 5 examinations should be done during pregnancy. If there is bleeding or abnormal fetal development during pregnancy, you need to increase the number of maternity examinations according to your condition.