<prompt> Which of the following is the artery for endometrial blood supply?Endometrial arteryMyometrial arterySpiral arteryCervical artery  <response>: Ans. C Spiral arteryRef: Grays Anatomy E-book, P 172 Spiral artery, a branch of radial artery, chiefly supplies endometrium. Endometrium and myometrium are supplied mainly by ovarian and uterine artery. 