Placental localization by ultrasound

Ultrasonographic Evaluation of Placental Thickness in Normal Singleton Pregnancies for Estimation of Gestation Age

“…[1,2] The role of ultrasonography in the evaluation of morphology and detection of placental abnormalities in entities such as non-immune hydrops, gestational diabetes and intrauterine growth retardation (IUGR) has been well established. One additional ultrasonographic parameter used to assess the placenta is placental thickness.…”

Placental Thickness- A Sonographic Evaluation of Gestational Age

“…(2001) reported that the value of mean placental thickness increases with advancing gestational age and almost match from 27-33 weeks. Kobayashi (1970) and Gottesfield (1966), Nyberg and Finberg (1990) also reported that the mean placental thickness increases in parallel with the gestational age. Fawzia A Habib (2002) studied 70 pregnancies and reported that a warning limit of placental diameter of 18 cm and placental thickness of 2 cm at 36 week were calculated to predict low birth weight infants.…”

131I Isotope Placentography: Simple Counting Equipment in Obstetric Practice

“…However, the invasive nature of this procedure and the radiation hazards for the fetus and mother make it a less than ideal method. Although there has been some debate about the possible superiority of isotope placentography over placental ultrasonography (3,12), there is now abundant and convincing evidence that ultrasonography gives more accurate results (2,6,(9)(10)(11)13). Moreover, ultrasonography would appear so far to be free of any significant hazards (1,4,5,7).…”