title: Third trimester placental grading by ultrasonography as a test of fetal wellbeing.
mesh_terms: D005260:Female; D005323:Fetal Monitoring / Q000379:methods*; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology*; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D014463:Ultrasonography