If the twins are monochorionic, the sonographer will also check about the amnionicity.
![actual 12 week fetus actual 12 week fetus](https://imageserve.babycenter.com/23/000/417/uAS9igCuzAn8zceTjrN7Ycqr41NhNSCR_med.jpg)
It shouldn’t hurt - but depending on how long you’ve been holding your pee or asked to stay in certain positions, you may need to request a minute to shift around and get comfortable again! The exam should take about 30 to 45 minutes, depending on the position of your baby. They may also take a short recording of your baby’s heartbeat.
![actual 12 week fetus actual 12 week fetus](https://smag31.com/wp-content/uploads/2019/05/maxresdefault-2-768x432.jpg)
Then, they’ll use a wand on this area to project a picture of your organs onto a screen. You’ll lie back on the exam table, and an ultrasound technician will apply a clear gel across your lower belly. (In occasional cases, an internal - known as transvaginal - scan may be necessary if the external scan can’t produce a clear image.) The 12-week ultrasound is usually an external scan.
![actual 12 week fetus actual 12 week fetus](https://10goneviral.com/wp-content/uploads/2018/02/1519197756_baby-born-12-weeks-early-and-weighing-just-0-8-lb-is-the-smallest-newborn-to-survive.jpg)
What should you expect at your appointment?