Population doubling time (PDT) of hTSCs treated with various concentrations of PGE₂.

<p>hTSCs were seeded in 6-well plates and cultured for six days on medium containing six different concentrations of PGE₂. PDT increased with increasing concentration of PGE₂, meaning that increased PGE₂ resulted in decreased cell proliferation (*p<0.05 when compared to control cells without PGE₂ treatment).