Sonogram before Clomid

Amanda 🐼 • With my husband for 25 years, married 15 💍 Postpartum/Newborn RN 💉 Addison Sarah born 1/1/16 🎀 Skylar Melina born 12/2/23 🩷
Did anyone else have to go in for a sonogram before starting Clomid for the first cycle? My doc told me to call him when AF came, to schedule a sono. He hadn't even given me the prescription yet. And if yes, what is that sonogram for?