perinatal AE subchorionic hematoma AE 10072596 QY, JX, HY 绒毛膜下血肿 https://pubmed.ncbi.nlm.nih.gov/32644443/ 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.