Threatening abortion September 20, 2016 Active substances: Progesterone Vitamin E Pentoxifylline Drotaverine Papaverine ICD-10: XV.O20-O29.O20.0 Threatening abortion Abortion, threatening abortion, abortion, midwifery, doctor's alphabet Threatening abortion is one of the most important causes of uterine bleeding in the first trimester of pregnancy. Causes, diagnostic materials and tactics of treating this condition. Print this Note:A source:Obstetrics [Electronic resource]: National leadership. Short edition / ed. E.K. Ailamazyan, V.N. Serova, V.E. Radzinsky, G.M. Savelieva. - M.: TALKDRUGS-Media, 2015.