OBSbasic
Which of the 4 Ts refers to uterine atony?
Answer
Tone
Explanation
**Tone** refers to uterine contraction. When the uterus fails to contract effectively after delivery, placental-bed vessels may continue bleeding. The slides identify tone as the largest contributor, at approximately 70–90%. **Key takeaway:** A poorly contracted uterus should prompt immediate consideration of atony.\n\n**Glossary:** **Uterine atony**: inadequate uterine contraction after birth.
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