Ultrasonography: Its usefulness and reliability in early pregnancy

Judgment of Fetal Age: II. Clinical Significance of Gestational Age and an Objective Method for Its Assessment

Robert Usher, Frances H. McLean, Kenneth E. Scott · Pediatric Clinics of North America · 1966 · 205 citations

Medicine, Human Development, Obstetrics +17

Ultrasonic placentography—a new method for placental localization

Kenneth R. Gottesfeld, H. E. Thompson, Joseph H. Holmes et al. · American Journal of Obstetrics and Gynecology · 1966 · 139 citations

Medicine, Maternal Health, Obstetrics +12

Growth and development of the human fetus prior to the twentieth week of gestation

Louis M. Hellman, Mitsunao Kobayashi, L.P. Fillisti et al. · American Journal of Obstetrics and Gynecology · 1969 · 134 citations

Medicine, Developmental Biology, Obstetrics +14

Ultrasound

Mitsunao Kobayashi, Louis M. Hellman, L.P. Fillisti · American Journal of Obstetrics and Gynecology · 1969 · 84 citations

Ultrasonics in Obstetrics and Gynaecology

Ian Donald, U. Abdulla · British Journal of Radiology · 1967 · 68 citations

Medicine, Gynecology, Obstetrics +12