Fig. 4From: Model construction and drug therapy of primary ovarian insufficiency by ultrasound-guided injectionCharacterization of hUC-MSCs and exosomes. A Morphology of hUC-MSCs in primary passage, Lipogenic and osteogenic morphology of hUC-MSCs; B HLA-DR, CD90, CD105, and CD73 expression of hUC-MSCs via flow cytometer; C The morphology of hUC-MSCs exosomes via TME; D Zeta detects the charge of exosomes; E The particle size of exosomes was detected by DLSBack to article page