Increased incidence and recurrence of recent corpus luteum without ovulation stigma (luteinized unruptured follicle-syndrome?) in baboons (Papio anubis, Papio cynocephalus) with endometriosis - D'Hooghe,T.M.; Bambra,C.S.; Raeymaekers,B.M.; Koninckx,P.R. (J Soc Gynecol Invest, 1996)