Ultrasound for ovulation?

Jessica • My name is Jessica, I am 27 years old. I have PCOS, My sweet husband and I have been blessed after 5 years TTC and many doctors, we have our rainbow twin girls. After 2 years we are ready to try for more❤️
Hey ladies, so I've been taking Letrozole for almost 3 years now.. had one pregnancy but lost my sweet baby last January. My new dr is having me do letrozole this month but is having me come in day 13 for an ultrasound and then will give me a shot to ovulate? Im confused has anyone else done this? What are the benefits?