Hoddick W K, Mahony B S, Callen P W, Filly R A
J Ultrasound Med. 1985 Sep;4(9):479-82. doi: 10.7863/jum.1985.4.9.479.
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.
