Immunohistochemistry of a rat VNO primary culture. Embryos at embryonic day 19 of Sprague-Dawley rats were used to prepare VNOs. Day 0 of pregnancy was defined as the first day that a vaginal plug was observed. The procedures used for isolating the VNOs were those described by Osada et al.
Arrows indicate the axon-like structures in the cells.
Bar, 0.05 mm.