Increased interleukin-1 and interleukin-1 receptor antagonist levels in cervical mucus in the ovultary phase in comparison with follicular phase. - Kanai,T.; Fukada-Miki,M.; Shimoya,K.; Azuma,C.; Hashimoto,K.; Nobunga,T.; Tokugawa,Y.; Tsujimoto,M.; Saji,F.; Murata,Y. (Gynecol Obstet Invest, 1997)