An ultrasound is used to view internal organs through a technique using ultrasound. A pelvic ultrasound in men is used to obtain images of the prostate or bladder and the rest of the urinary tract. In women, it can also visualize the bladder and urinary tract, but also the genital organs such as the uterus, ovaries, and fallopian tubes. Because of its complete harmlessness to the individual or the fetus, it is also practiced in pregnant women to monitor the progress of pregnancy. Three ultrasounds are performed during pregnancy, around 12 weeks (known as dating), 22 weeks (called morphological) and 32 weeks (called growth).