Spatial expression of uterine (A) and placental (B) TRPV6 expression in a time-dependent manner. A, Rat uteri from P5.5 to P10.5 were separately shown into the non-attached or attached uteri using anit-TRPV6 serum. u, attached uterus; f, placenta-like structure; arrows, epithelial and glandular cells. B, Rat placentas from P11.5 to P13.5 were presented in a time-dependent manner. la, labyrinth zone; sp, spongy zone; gc, giant cells; arrows, fetal membrane.