Main blood supply to the head and neck of femur comes from:

Most of the blood supply to the head and neck of femur is supplied by the medial circumflex femoral aery, its retinacular and epiphyseal branches included. Medium circumflex femoral aery is an aery that branches from the deep femoral aery and it supplies the medial pa of the thigh and hip joint muscles. Ref: Merriam Websters medical dictionary, by Merrium Webster, Page 400; Campbell's Operative Ohopaedics 10th/2908.