Since ultrasound uses Doppler imaging without any radiation or adverse effects, there are no adverse effects if a woman has 4 ultrasounds in 1 month during non-pregnancy or after pregnancy. Moreover, it is necessary to review the ultrasound several times during the pregnancy itself to see the growth and development of the fetus. For women who are not pregnant, there is no need to worry about adverse effects on the woman’s body from having an ultrasound of the uterine adnexa or an ultrasound of the liver, gallbladder, pancreas and spleen. For women who are pregnant, ultrasound is done 4 times in 1 month to check the growth and development of the embryo. Abnormal vaginal bleeding or poor embryonic development is the reason why ultrasound needs to be repeated.