We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleTime of day variation in rates of obstetric intervention to assist in vaginal delivery.AuthorsWebb, D A; Culhane, JPublicationJournal of epidemiology and community health, 2002, Vol 56, Issue 8, p577ISSN0143-005XPublication typeJournal ArticleDOI10.1136/jech.56.8.577