Yakuwa K, Otsuki K, Nakayama K, Hasegawa A, Sawada M, Mitsukawa K, Chiba H, Nagatsuka M, Okai T. Recombinant human lactoferrin has a potential to suppresses uterine cervical ripening in preterm delivery in animal model. Archives of Gynecology and Obstetrics. 2006 Oct 10;275(5):331–4. doi: 10.1007/s00404-006-0261-9.