During amnioinfusion, the infusion should be stopped periodically to assess changes in:

Comprehensive and Detailed Explanation From Exact Extract–Based NCC C-EFM References:

During amnioinfusion, NCC emphasizes monitoring for uterine overdistention, which can lead to uterine hypertonus, uterine rupture, or placental separation. The primary way to evaluate overdistention is by measuring baseline uterine pressure via IUPC.

Rising resting tone (>20–25 mmHg) indicates accumulating fluid and risk.

Stopping the infusion intermittently allows recalibration and assessment of uterine baseline pressure.

Contraction pattern (option B) is important but not the primary safety parameter.

Pain (option C) is nonspecific and not a reliable indicator of uterine overdistention.

Thus, the infusion is stopped to assess baseline uterine pressure.