Subinvolution of the uterus postpartum is most commonly caused by:

• A Excessive breastfeeding causing oxytocin-induced cramps
• B Ovarian cysts compressing the uterus
• C Prolonged use of NSAIDs postpartum
• D Retained products of conception or endometritis ✓

Explanation

Subinvolution — failure of the uterus to return to its normal size after delivery — is most commonly caused by retained products of conception (RPOC) and/or endometritis (postpartum uterine infection). Both conditions prevent normal uterine involution by sustaining inflammation and preventing myometrial contraction. Clinically it presents with prolonged or renewed lochia and a persistently enlarged, soft uterus on examination. Treatment involves antibiotics and/or suction evacuation of RPOC.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.