Correct time for fetal gender detection Pregnancy is one of the most special experiences in the lives of most women, and knowing the gender of the fetus is also a very important part for many pregnant women. This requires accurate knowledge of the correct time for fetal gender testing. Below we will introduce in detail the following four aspects: 1. Methods for fetal gender detection. Early fetal gender detection methods are still relatively simple, including ultrasound, Down syndrome screening and other methods, but these are not specific enough and accurate.