Placental thickness.

Abstract

The sonograms of 200 randomly selected singleton pregnancies were reviewed. Placental thickness was measured and correlated with menstrual age. The placenta was demonstrated to increase in thickness with advancing menstrual age. At no stage of pregnancy was the normal placenta greater than 4 cm in thickness. Potential pitfalls in measuring placental thickness are addressed, as well as potential causes of aberrations in placental thickness.

Ultrasonographic measurement of placental thickness and its correlation with estimated fetal weight

“…Historically, a placenta of greater than 4 cm in thickness has been regarded as abnormal and associated with various poor outcomes. [4][5][6] However, the ratio of the birth weight to the placental weight has been used since the 1940s as an index for the appropriateness of fetal growth and there are no current data to support this cutoff value or specifically addressing placental thickness in all trimesters of gestation. As such, few studies have been done to correlate placental thickness with the fetal weight.…”

Evolução das Características Ecográficas da Placenta, da Posição e da Apresentação Fetal em Gestações Normais.

“…Tem-se dado importância também à espessura placentária pela sua relação com a presença de infecções materno-fetais e com a idade gestacional 5 . A espessura placentária é obtida por meio da medida a partir da placa basal até a placa corial, no ponto da inserção do cordão umbilical.…”

Correlation of Ultrasonographic Estimated Placental Thickness with Gestational Age and Fetal Weight in Late Second and Third Trimester

“…This is due to increase in placental thickness with gestational age. [3] Several studies have reported an increase the placenta thickness with gestational age. The Studies reported by [4][5][6] It was observed that the placenta thickness gradually increased from 11 weeks of gestation to 39 weeks.…”

“…It is technically defined as the apposition or fusion of fetal organs to maternal tissue for the purpose of physiologic exchange. [3] The placenta thickness appears to be promising parameter for estimation of gestation of intra uterine fetus age. This is due to increase in placental thickness with gestational age.…”