USMLE Step 2 CK Lecture Notes 2019: Obstetrics/Gynecology (Kaplan Test Prep)

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ORIENTATION IN UTERO


Orientation of the long axis of the fetus to the long axis of the uterus. The most
common lie is longitudinal (99% of fetuses at term).


Figure I-13-1. Longitudinal Fetal   Lie

Longitudinal:   fetus   and mother  in  same    vertical    axis
Transverse: fetus at right angle to mother
Oblique: fetus at 45° angle to mother
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