The Robson classification, also known as the 10-groups classification or ten groups classification system (TGCS), is a system for classifying pregnant women who undergo childbirth. It was developed to allow more accurate comparison of caesarean section rates between different settings, whether they be individual hospitals or entire regions or countries. Endorsed by the World Health Organization in 2015, it differs from other classification systems in that it accounts for all women who undergo delivery, and not just those who proceed to cesarean section.[1]
The ten mutually-exclusive groups were first described by the obstetrician Michael Robson in 2001, and are defined based on the category of the pregnancy, the woman's previous obstetric record, the course of the labour and delivery, and the gestational age at delivery.[2]
Nulliparous, single cephalic pregnancy, at least 37 weeks' gestation, spontaneous labour
Nulliparous, single cephalic pregnancy, at least 37 weeks' gestation, with either induced labour or a cesarean section prior to the onset of spontaneous labour
Multiparous, no previous caesarean section, single cephalic pregnancy, at least 37 weeks' gestation, spontaneous labour
Multiparous, no previous caesarean section, single cephalic pregnancy, at least 37 weeks' gestation, with either induced labour or a cesarean section prior to the onset of spontaneous labour
Previous caesarean section, single cephalic pregnancy, at least 37 weeks' gestation
Nulliparous, single breech pregnancy
Multiparous, single breech pregnancy
Multiple pregnancy
Single pregnancy with transverse or oblique lie
Single cephalic pregnancy, 36 weeks' gestation or less
The classification is increasingly used to monitor and compare rates of caesarean section in many countries, and some further subdivisions of the ten groups have been proposed.[3]
^World Health Organization Human Reproduction Programme, 10 April 2015 (2015). "WHO Statement on caesarean section rates". Reprod Health Matters. 23 (45): 149–50. doi:10.1016/j.rhm.2015.07.007. hdl:11343/249912. PMID 26278843. S2CID 40829330.{{cite journal}}: CS1 maint: numeric names: authors list (link)
^Robson, M (2001). "Classification of caesarean sections". Fetal and Maternal Medicine Review. 12 (1): 23–39. doi:10.1017/S0965539501000122.
^Betrán AP, Vindevoghel N, Souza JP, Gülmezoglu AM, Torloni MR (2014). "A systematic review of the Robson classification for caesarean section: what works, doesn't work and how to improve it". PLOS ONE. 9 (6): e97769. Bibcode:2014PLoSO...997769B. doi:10.1371/journal.pone.0097769. PMC 4043665. PMID 24892928.{{cite journal}}: CS1 maint: multiple names: authors list (link)
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