Patient-specific trophoblast stem cells for placental medicine.

The placenta is an essential organ that supports fetal development during pregnancy. The establishment of human trophoblast stem cells has enhanced our understanding of placental development; however, their limited diversity constrains our ability to capture interindividual variation. Patient-specific trophoblast stem cells (pTSCs), derived from induced pluripotent stem cells, fibroblasts, cytotrophoblasts, or chorionic villus tissue, retain the unique genetic and epigenetic backgrounds of individual patients. Notably, chorionic villus-derived trophoblast stem cells can be obtained without terminating a pregnancy, allowing for integration with prospective clinical data. pTSCs, therefore, provide powerful platforms to investigate the pathogenesis of placental disorders, assess individual risk, and advance personalized therapeutic strategies. This review highlights recent advances in pTSC derivation and discusses their potential applications.