Gregory D. O'Brien

Ultrasound Scanning of Ovaries to Detect Ovulation in Women

John T. Queenan, Gregory D. O'Brien, Lyn M. Bains et al. · Fertility and Sterility · 1980 · 249 citations

Infertility, Fertility, Female Infertility +8

Assessment of gestational age in the second trimester by real-time ultrasound measurement of the femur length

Gregory D. O'Brien, John T. Queenan, Stuart Campbell · American Journal of Obstetrics and Gynecology · 1981 · 164 citations

Obstetric Imaging, Femur Length, Medical Ultrasound +11

Growth of the ultrasound fetal femur length during normal pregnancy

Gregory D. O'Brien, John T. Queenan · American Journal of Obstetrics and Gynecology · 1981 · 133 citations

Obstetric Imaging, Normal Pregnancy, Fetal Medicine +8

Ultrasound measurement of fetal limb bones

John T. Queenan, Gregory D. O'Brien, S. Campbell · American Journal of Obstetrics and Gynecology · 1980 · 126 citations

Bone Imaging, Anatomy, Intrapartum Ultrasound +5

Ultrasound fetal femur length in relation to intrauterine growth retardation

Gregory D. O'Brien, John T. Queenan · American Journal of Obstetrics and Gynecology · 1982 · 31 citations

Obstetric Imaging, Fetal Medicine, Gynecology +7