Editing Childbirth (section)

====Postpartum bleeding====

{{Main|Postpartum bleeding}}

Bleeding (haemorrhage) is the leading cause of maternal death worldwide accounting for approximately 27.1% of maternal deaths.<ref name=":8">{{Cite journal |last1=Say |first1=Lale |last2=Chou |first2=Doris |last3=Gemmill |first3=Alison |last4=Tunçalp |first4=Özge |last5=Moller |first5=Ann-Beth |last6=Daniels |first6=Jane |last7=Gülmezoglu |first7=A. Metin |last8=Temmerman |first8=Marleen |last9=Alkema |first9=Leontine |date=1 June 2014 |title=Global causes of maternal death: a WHO systematic analysis |journal=The Lancet Global Health |language=English |volume=2 |issue=6 |pages=e323–e333 |doi=10.1016/S2214-109X(14)70227-X |issn=2214-109X |pmid=25103301|s2cid=8706769 |doi-access=free |hdl=1854/LU-5796925 |hdl-access=free }}</ref> Within maternal deaths due to haemorrhage, two-thirds are caused by postpartum haemorrhage.<ref name=":8" /> The causes of [[Postpartum bleeding|postpartum haemorrhage]] can be separated into four main categories: tone, trauma, tissue, and thrombin. Tone represents [[uterine atony]], the failure of the uterus to contract adequately following delivery. Trauma includes lacerations or uterine rupture. Tissue includes conditions that can lead to a retained placenta. [[Thrombin]], which is a molecule used in the human body's blood clotting system, represents all coagulopathies.<ref>{{Cite journal |last1=Bienstock |first1=Jessica L. |last2=Eke |first2=Ahizechukwu C. |last3=Hueppchen |first3=Nancy A. |date=29 April 2021 |title=Postpartum Hemorrhage |journal=The New England Journal of Medicine |volume=384 |issue=17 |pages=1635–1645 |doi=10.1056/NEJMra1513247 |issn=1533-4406 |pmid=33913640 |pmc=10181876 |s2cid=233447661 }}</ref>