During telogen in 3 week and 1 day old mice (Figure 2A and 2D; Table S1), Lhx2 expression could not be detected in any HF (Figure 2B and 2C; Figure S3A), similar to what was observed in HFs in telogen in 7–8 weeks old mice (Figure 1J). The gene discussed is LHX2; the disease is hydrops fetalis.