No, it can be suspected by ultrasound, and diagnosed by hysteroscopy.
Read the full article on: Asherman’s Syndrome – Signs, Treatment & Chances of Pregnancy ( 53).

José Antonio Duque Gallo
M.D. Ph.D.
Gynecologist
Bachelor's Degree in Medicine and Surgery from the University of Valencia. Specialist in Obstetrics & Gynecology. He has an extensive experience in the field of Human Reproduction. he has been Head of Human Reproduction Service at the Miguel Servet University Hospital of Zaragoza ans is currently the Medical Director of the GOBEST Clinic in Zaragoza.
Licence: 505005367