Fig. 1From: Functional reorganization of monoamine transport systems during villous trophoblast differentiation: evidence of distinct differences between primary human trophoblasts and BeWo cellsCellular expression and secretion of hCG as a marker of trophoblast differentiation. Differences in hCG expression and secretion, respectively measured by quantitative PCR (A) and ELISA (B), between undifferentiated (CTB) and differentiated (STB) cells. Presented data are means ± SD (n ≥ 4), with indications of statistical significance obtained from paired t-tests: **p ≤ 0.01, ***p ≤ 0.001Back to article page