Ma'anar ƙamus na "zafin naƙuda" yana nufin ƙaƙƙarfan naƙuda mahaifar da ke faruwa a lokacin haihuwa. Waɗannan ƙanƙara yawanci suna da zafi kuma suna iya ƙara ƙarfi yayin da mahaifiyar ke ci gaba ta matakan nakuda. Ana amfani da kalmar “ciwon naƙuda” don bayyana rashin jin daɗin jiki da mata ke fuskanta yayin haihuwa.
