What is a double maternity photo?

The double image of maternity photos is newly put forward by the maternity photo industry. Generally, maternity photos are divided into single people, including husband, parents and Dabao. This so-called pregnant woman's double image was taken with the fetus. The pregnant woman's double image was achieved by capturing the later stage of the fetal image, combining the maternal photos with four-dimensional color Doppler ultrasound. But now the hospital has a thinking color ultrasound without maternal photos, and the photo studio has no four-dimensional color ultrasound with maternal photos. At present, only photography of pregnant women in October diary can be realized.