title: Abstracts of the 21st National Congress on Obstetrics and Gynecology and 3rd National Congress of Obstetrics, 11-14 October 2007, Plovdiv, Bulgaria.
mesh_terms: D005260:Female; D005831:Genital Diseases, Female; D006176:Gynecology; D006801:Humans; D009774:Obstetrics; D011247:Pregnancy; D011248:Pregnancy Complications