The aim of a new study published in the International Journal of Gynecology and Obstetrics was to determine whether the prevalence of ultrasonography signs of abnormally invasive placenta (AIP) change during pregnancy. This retrospective analysis recruited 105 women with a prenatal diagnosis of AIP, confirmed at delivery, between January 1, 2007, and April 30, 2017. Ultrasonography signs of AIP were recorded at four different phases of pregnancy: early first (6-9 weeks), first (11-14 weeks), second (15-24 weeks), and third trimesters (25-36 weeks). The findings revealed that low implantation of the gestational sac was present on all ultrasonography images from the early first trimester in comparison with, on 27.7% images, from 11-14 weeks of pregnancy. The identification of loss of the clear space, placental lacunae, bladder wall interruption, and uterovesical hypervascularity all increased from the early first trimester onwards; these could all be identified in a majority of patients at 11-14 weeks of pregnancy. Hence, it was inferred that the prevalence of ultrasonography signs suggestive of AIP varied throughout pregnancy. It was stated that during the early first trimester, indicators of AIP were similar to those of a cesarean scar pregnancy; while classical ultrasonography signs of AIP were already present at 11-14 weeks of pregnancy for most patients.