Fig. 1. Exemplary illustration of binuclear trophoblast giant cells detectable in HE-stained histological slides of flushed trophoblast tissue from day 18 pregnant heifers. (A) Photo of the trophectoderm of a day 18 conceptus (1.0 × 10; Leica DFC 290; Leica, Germany). (B) Microscopic view of trophectoderm tissue with trophoblast giant cells (arrow) stained with H&E (Olympus XC50; 40×/0.50 UPlanFI; Olympus, Germany).
