A 24 year old woman presents with deep dyspareunia and severe pain in every cycle. What is the initial investigation?

The key is B. Pelvic US. [The likely diagnosis is endometriosis. Endometriosis is a condition where

tissue similar to the lining of the womb starts to grow in other places, such as the ovaries and fallopian

tubes. There may be pelvic pain that is worse during period. Period pain that stops the patient from

normal activity. There may be dyspareunia, menorrhagia and difficulty getting pregnant].