"It only takes 10 minutes, and pregnant women over 6 weeks can detect the sex of the fetus (male or female) at home through urine samples. It's convenient, safe, and has an accuracy rate of over 90%. Compared with ultrasound, it advances the detection time by 10 weeks and improves the accuracy rate by 10%." Currently, a product called "Yantailing" is very popular among pregnant women on the Internet, and many expectant parents are eager to try it out in order to find out the gender of their unborn child in advance. However, experts unanimously oppose it: currently, they have not heard of this fetal sex detection technology, and selling such reagents goes against national regulations and policies, so they absolutely do not recommend that expectant parents try it.