Normal & Abnormal Labour · NEET PG Preparation Obstetrics & Gynaecology
A 28-year-old primigravida at 39 weeks of gestation presents in active labor. On digital vaginal examination, the cervix is fully dilated and fully e…
Practice question from Normal & Abnormal Labour (NEET PG Preparation Obstetrics & Gynaecology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-334C1C
A 28-year-old primigravida at 39 weeks of gestation presents in active labor. On digital vaginal examination, the cervix is fully dilated and fully effaced. The leading part is the vertex at station +2, with the sagittal suture in the right oblique diameter and the small fontanel located towards the left anterior quadrant of the maternal pelvis. What is the exact fetal position?
- A.Left occipito-anterior (LOA)
- B.Right occipito-anterior (ROA)Correct answer
- C.Left occipito-posterior (LOP)
- D.Right occipito-posterior (ROP)
Solution
The position of the fetus is designated by the relation of the reference point (occiput) to the maternal pelvis. The sagittal suture lies in the right oblique diameter. The small fontanel (occiput) is pointing towards the left anterior quadrant? Wait, let's re-read carefully: sagittal suture in the right oblique, small fontanel (occiput) towards the left anterior quadrant = Left Occipito-Anterior (LOA). Let's check: Right oblique diameter runs from right sacroiliac joint to left iliopectineal eminence. If the occiput is at the left anterior end of this diameter, it is LOA. Thus option A is correct.
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