Re: a question of angle of view.
Barbera
A F
AF
Department of Obstetrics and Gynecology, Denver Health Medical Center, Mail Code 0660, 777 Bannock, Denver, CO 80204, USA.
Hobbins
J C
JC
D005260:Female; D006257:Head / Q000000981:diagnostic imaging*; D006801:Humans; D007743:Labor, Obstetric / Q000502:physiology*; D011247:Pregnancy; D014463:Ultrasonography