Fig. 4

Effects of hUMSC transplantation on the fertility of POI rats. a Gross observation of ovarian specimen in each group. b Summary of embryo numbers at implantation sites of each group. Data are expressed as the means ± SD. n = 56, *P < 0.05, **P < 0.01, and ***P < 0.001. hUMSCs human umbilical cord-derived mesenchymal stem cells, POI primary ovarian insufficiency, and SD standard deviation