(a) Percentage of mice with pups per total mated mice.Numbers on bars indicate mice with pups over total number of mated mice. *p < 0.05 by Student's t-test. (b) Cre recombinase activity starts differently in Foxa2f/fLtfCre+ and Foxa2f/fPgrCre+ females. (c) Immunostaining of FOXA2 in the uteri on postnatal day 30 and day 4 pregnancy of Foxa2f/f, Foxa2f/fLtfCre+, and Foxa2f/fPgrCre+females. Epithelial cells are outlined by cytokeratin 8 (CK8) staining. Scale bars: 100 μm. (d) In situ hybridization of Lif in day 4 of pregnant uteri from Foxa2f/f, Foxa2f/fLtfCre+, and Foxa2f/fPgrCre+ females. White arrows point to uterine glands. Scale bar: 200 μm. Le, luminal epithelia; Ge, glandular epithelia; S, stroma.