Abdominal ultrasound 1. Pregnant women adopt a supine position, lift the clothing to fully expose the abdomen; 2. The doctor will apply coupling agent on the abdomen of the pregnant woman, and then use the ultrasound probe to scan the abdomen to understand the growth and development of the fetus; 3. At the end of the examination, the pregnant woman can wipe off the remaining coupling agent on the abdomen with a tissue. Vaginal ultrasound 1.The pregnant woman will lie on the examination bed in a supine position with her buttocks near the edge of the bed, take off her pants and put her legs apart on the leg brace to fully expose the perineum, and put her hands on her chest or both sides of her body; 2.The doctor will put a sterilized condom on the ultrasound probe and apply a small amount of coupling agent to gently insert it into the vagina and move it slowly for scanning; 3.At the end of the examination, the pregnant woman can wipe off the coupling agent in the vagina with a tissue.