Does men also need to draw blood for Down syndrome screening?

When Tang Screening does not draw a man’s blood, only the pregnant woman has blood type O, and the husband has blood type A/B/AB. Both parties need to draw blood for testing. When the pregnant woman does a full set of Tang Screening, there is a blood type test item, which can be There is no need to check again separately. My husband's blood type can be checked at YHD, but it's very expensive, like more than 90 yuan. You can also go to another hospital for a check. As long as you know your blood type, tell the doctor.