Schematic representation of A-mode measurement of the fetal biparietal diameter in the early 1960s.

Source of illustration:
"Ultrasonic diagnosis in Gynecology and Obstetrics" -- by S Mizuno. In Vol 19, no.2, Nippon Sanka Fujinka Gakkai Zasshi pp.171-175, 1967. (in Japanese).

Back to History of Ultrasound in Obstetrics and Gynecology.