However, unlike TGFβ1-deficient skin, which exhibits an extended phase of postnatal HF growth, TGFβ2-deficient skin exhibits embryonal impairment of follicle germination [65], but approximately 50% of TGFβ2-deficient shoots do not appear to be able to progress to the downward growth stage. The gene discussed is TGFB1; the disease is hydrops fetalis.