We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleIncreased saliva oestriol to progesterone ratio before preterm delivery: a possible predictor for preterm labor?AuthorsDarne, J; McGarrigle, H H; Lachelin, G CPublicationBMJ, 1987, Vol 294, Issue 6567, p270ISSN0959-8138Publication typearticleDOI10.1136/bmj.294.6567.270