Habka qufulka xargaha waa qayb muhiim ah oo u oggolaanaya indhoolayaasha in la sara kiciyo oo si badbaado leh loo yareeyo. Waxay ka kooban tahay aalad bir bir ah oo badanaa ku fadhida wadada tareenka ugu sareeya ee indha la '. Qufulka xadhiggu wuxuu u habeeyay inuu ku hayo xariga sarkaalka meesha markii indha la 'yahay meesha aad rabto. Adigoo hoos u jiidaya xadhigga sarka, qufulka xadhigguna wuxuu ku socdaa xadhigga meesha, ka hortagga indhoolayaasha inuu dhaqaaqo. Qaabkan ayaa u oggolaanaya isticmaaleha inuu ku xirto indhoolayaasha dherer kasta oo la doonayo, taas oo si sax ah u xakameynaysa xaddiga iftiinka ee galaya qolka iyo bixinta asturnaanta. Si loo sii daayo qufulka xargaha, si tartiib ah kor ugu kac xarka sare si loo sii daayo farsamooyinka, taasoo u oggolaanaysa indhoolayaasha in la sara kiciyo ama hoos u dhigo sida la doonayo.