Placental volume at gestational week 27 and subsequent fetal growth: An observational study.

Objectives: To study if placental volume and placental to fetal ratio at gestational week (GW) 27 correlate with subsequent fetal growth. We also investigated whether the 1/3 smallest and 1/3 largest fetuses have different growth potential depending on placental volume.

Methods: Placental and fetal volume was measured by magnetic resonance imaging (MRI) at GW 27 and 37 in 86 singleton pregnancies.

Two-dimensional (2D) placental ultrasound measurements - The correlation with placental volume measured by magnetic resonance imaging (MRI).

Introduction: Information about placental size in ongoing pregnancies may aid the identification of pregnancies with increased risk of adverse outcome. Placental volume can be measured using magnetic resonance imaging (MRI). However, this method is not universally available in antenatal care.

Placental size at gestational week 27 and 37: The associations with pulsatility index in the uterine and the fetal-placental arteries.

Introduction: Fetal growth restriction is known to be related to decreased fetal and placental blood flow. It is not known, however, whether placental size is related to fetal and placental blood flow. We studied the correlations of intrauterine placental volume and placental-fetal-ratio with pulsatility index (PI) in the uterine arteries, fetal middle cerebral artery, and umbilical artery.

Placental size at gestational week 36: Comparisons between ongoing pregnancies and deliveries.

Introduction: We aimed to compare placental size and placental size relative to fetal size (ratio) in ongoing pregnancies examined by magnetic resonance imaging (MRI) at gestational week 36 with placental size among all deliveries at gestational week 36 during the same time period.

Material And Methods: Ongoing unselected singleton pregnancies (n = 89) were examined by MRI at median gestational week 36+5 days during 2017-2018, and placental and fetal volumes (cm ) were calculated. The placental size and ratio in ongoing pregnancies were compared with placental size and ratio among all deliveries in Norway at gestational week 36 (median gestational week 36+4 days) during 2016-2019 (n = 5582).