Placental maturity grade 1 at 16 weeks gestation is not sure if it is normal, it needs to be combined with other developmental indicators of the fetus to make a comprehensive judgment.
Placental maturity is classified by using ultrasound through the morphological changes of the placenta, used to assess the maturity of the fetal lungs and gestational weeks, monitoring fetal growth, etc. The maturity of the placenta is divided into four grades: grade 0, grade Ⅰ, grade Ⅱ and grade Ⅲ.
Grade 0 refers to the absence of echogenicity of the basal layer, uniform echogenicity of the placental parenchyma, and straight and smooth chorionic plate, which mostly occurs before the 28th week of pregnancy. Grade I refers to the absence of echogenicity of the basal layer, with scattered uneven dense punctate echoes of the placental parenchyma and tiny wavy undulations of the chorionic villous plate, and is most often seen between 29 and 36 weeks of gestation.
Simply by looking at the placental maturity, 16 weeks of placental maturity level 1 does not match the gestational week, but if the fetus develops normally and the mother does not have any discomfort, intervention is usually not needed. However, in such cases, a hospital visit should be made, and in conjunction with ultrasound measurements of the fetal diameters, a decision should be made under the guidance of an obstetrician as to whether or not early intervention should be given in order to reduce the incidence of adverse pregnancies.