perinatal AE subchorionic hemorrhage AE https://pubmed.ncbi.nlm.nih.gov/32644443/ 绒毛膜下出血 QY, JX, HY This is an AE which is bleeding beneath the chorion membranes that enclose the embryo in the uterus and appears to occur due to partial detachment of the chorion membranes from the wall of the uterus. 10071010