High-resolution endovaginal ultrasonography of the endometrium: a noninvasive test for endometrial adequacy
Grunfeld L, Walker B, Bergh PA, Sandler B, Hofmann G, Navot D.
High-resolution endovaginal ultrasonography of the endometrium: a noninvasive test for endometrial adequacy.
Obstet Gynecol 1991; 78:200-4.