Fig. 3.

(a) Reconstructed 3D volume of PA data of mouse lower abdomen at 808 nm at gestational day 12. Here two placentas were indicated as p and common iliac arteries were indicated as ca. (b) The skin vasculature of mouse at same field of view of (a), acquired at 532 nm. (c) Overlay of (a) and (b) rendered at Amira. (d) Spine with abdominal aorta (aa) of the mouse indicated by yellow box. (e) PA image of spiral arteries (sa) and placenta (p) at gestational day 17. (f) Our observation of the two separate vascular components of the uterine vasculature — spiral arteries and placenta — corresponds to the vasculature revealed through a latex cast of the rat uterine vasculature of the pregnant horn (PH) [39]. Scale bar in the photoacoustic images is 3 mm. Videos of reconstructed 3D volume of the PA images are provided in Supplementary.