Air borne pheromones.
D000388:Air; D000818:Animals; D001695:Biology / Q000266:history; D001717:Birds; D004971:Estrus; D005260:Female; D049690:History, Ancient; D049691:History, Medieval; D008297:Male; D051379:Mice; D010063:Ovum; D010675:Pheromones; D011247:Pregnancy
D010675:Pheromones