Acta Veterinaria Scandinavica 2008, 50:41 http://www.actavetscand.com/content/50/1/41 a c e b d f SFciganunrieng1electron microscopy of Thai native crossbreed stallion sperm Scanning electron microscopy of Thai native crossbreed stallion sperm; a – normal sperm (top) and loose narrow head (below); b – narrow head with proximal cytoplasmic droplet; c – round head; d – acrosomal defect; e – acrosomal defect and bent tail and f – proximal cytoplasmic droplet with coiled tail (a-e – 2000×, bar = 10 micrometers; f – 3600x, bar = 1 micrometers). Page 4 of 9 (page number not for citation purposes)