A fetal head is well flexed during a normal vertex labour. Which diameter usually enters the maternal pelvis?

Correct answer: A. Suboccipitobregmatic diameter

  • A. Suboccipitobregmatic diameter
  • B. Occipitofrontal diameter
  • C. Mentovertical diameter
  • D. Submentobregmatic diameter

Explanation

Good flexion presents the suboccipitobregmatic diameter, which is favourable for vaginal birth. Extension presents larger or less favourable diameters and may make labour more difficult.

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Normal labour covers the onset and stages of labour, cervical effacement and dilatation, fetal lie and presentation, the cardinal movements, and maternal and fetal monitoring. It includes partograph use, pain relief, normal vaginal birth, active management of the third stage, placental assessment and immediate care after delivery.

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