Question:easy
What is the presenting part in a transverse lie?
What is the presenting part in a transverse lie?
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A fetus lying crosswise presents its shoulder over the cervix.
Updated On: Jun 24, 2026
- Shoulder
- Face
- Vertex
- Brow
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The Correct Option is A
Solution and Explanation
Step 1: Picture the fetal orientation. A transverse lie means the baby is lying sideways, with its long axis at right angles to the mother's spine, so the head sits in one flank and the breech in the other. Because of this crosswise position the lower uterine segment is not filled by head or buttocks.
Step 2: Find what reaches the cervix. When labour begins the part that descends toward and overlies the internal os is the fetal shoulder. For this reason transverse and the related oblique lie are clinically labelled shoulder presentations.
Step 3: Rule out the cephalic options. Vertex, face, and brow are variants of head-first presentation that belong to a longitudinal lie, not a transverse one. The only valid presenting part across the cervix in a transverse lie is the shoulder.
\[\boxed{\text{Shoulder (option 1)}}\]
Step 2: Find what reaches the cervix. When labour begins the part that descends toward and overlies the internal os is the fetal shoulder. For this reason transverse and the related oblique lie are clinically labelled shoulder presentations.
Step 3: Rule out the cephalic options. Vertex, face, and brow are variants of head-first presentation that belong to a longitudinal lie, not a transverse one. The only valid presenting part across the cervix in a transverse lie is the shoulder.
\[\boxed{\text{Shoulder (option 1)}}\]
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