Jansen CHJR, Kleinrouweler CE, Kastelein AW, et al. - As the cases of placenta previa or a low‐lying placenta in the second trimester, in majority, exhibit normal placental position in the third trimester, researchers sought to determine if the distance between the placenta and the internal os of the cervix (IOD) in the second trimester may aid in the prediction of third‐trimester low‐positioned placenta. In addition, they defined a cut‐off value at which all cases of third‐trimester low‐positioned placenta are identified. In this prospective cohort study, 958 women undergoing a transvaginal ultrasound examination between 18 and 24 weeks' gestation who had a low‐positioned placenta, defined as an IOD of < 20 mm, were included. Per findings, a low‐lying placenta or placenta previa in the second trimester persisted more frequently in the third trimester in cases with posteriorly located placenta vs those with placenta located on the anterior side. In cases with an anterior low‐positioned placenta in the second trimester, the cut‐off value of the distance between the placental edge and the internal os of the cervix should be lowered from 20 mm to 5 mm for re‐evaluation of placental position in the third trimester.