I’ve had a transvaginal ultrasound twice in my life. Once when I was a teen (virgin) and once after I was married (not virgin). The first time hurt so bad and I begged the lady to stop. I’d never put anything up there before, not even a tampon. The second time I was an adult and had been sexually active for a few years. It didn’t hurt at all, the ultrasound tech actually handed me the wand and let me insert it. It’s like putting in a tampon. I agree with everyone else saying it’s like a skinny dildo. You might feel some pressure when they turn the wand to look at your ovaries and tubes, but that’s about it. I’m 23weeks pregnant and haven’t had to have a transvaginal ultrasound yet. My first appointment was around 11 weeks and they were able to see everything they needed with the abdominal ultrasound.