DCE-MRI was performed on pregnant mice of WT, Cdkn1a, p53, Cdkn2a and Cdkn2a;p53 genotypes on day E14.5. Mice were injected i.v. with an albumin-labeled contrast agent (biotin-BSA-GdDTPA; 10 mg/mouse) and placental enhancement was monitored at 9.4T MRI for 60 min. (B) Representative SI dynamics of a single WT placenta (marked in A), following biotin-BSA-GdDTPA administered for 60 min. SI parameters of Initial Enhancement and Recovery are illustrated. 