Vaginal sonography versus serum human chorionic gonadotropin in early detection of pregnancy

Discriminatory hCG zone: its use in the sonographic evaluation for ectopic pregnancy.

Nicholas Kadar, G R DeVore, Roberto Romero · PubMed · 1981 · 275 citations

Medicine, Gynecology, Obstetrics +13

Early gestation: correlation of HCG levels and sonographic identification

D A Nyberg, RA Filly, BS Mahony et al. · American Journal of Roentgenology · 1985 · 69 citations

Medicine, Gynecology, Obstetrics +14

Landmarks during the first forty-two days of gestation demonstrated by the β-subunit of human chorionic gonadotropin and ultrasound

Frances R. Batzer, Stuart Weiner, Stephen L. Corson et al. · American Journal of Obstetrics and Gynecology · 1983 · 45 citations

Medicine, Gynecology, Obstetrics +10

Gestational-pseudogestational sac: A new ultrasonic criterion for differential diagnosis

H Abramovici, Ron Auslender, Aby Lewin et al. · American Journal of Obstetrics and Gynecology · 1983 · 22 citations

Medicine, Gynecology, Obstetrics +13

Early intrauterine pregnancy or decidual cast: an anatomic--sonographic approach.

P Nelson, J D Bowie, E R Rosenberg · Journal of Ultrasound in Medicine · 1983 · 11 citations

Medicine, Anatomy, Obstetrics +16