Histopathology of fused triplet placenta in rat

A fused triplet placenta was observed in a Wistar Hannover rat on gestation day 15. Each (referred to as PL-A, PL-B, and PL-C) of this attached one fetus each, but their fetal weights were lower than that the only normal PL-N) dam. Histopathologically, thinning trophoblastic septa dilatation maternal sinusoid labyrinth zone PL-B PL-C, not PL-A or PL-N. The points placental fusion at junctional derived from each side without connective tissues, septum composed giant cells. Although had solitary metrial gland, PL-C shared gland with spiral artery terminus branching towards zone.