Obstetric Topic 20. Dystocia caused by abnormal presentation and position

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Planned Source Use

• Status: placeholder page created from the obstetric topic list.
• Next step: add compact oral-exam notes after `text1` / `text2` / `text3` / `text4` are provided.
• Style: `text1`-like compact bullets, corrected facts, high-yield obstetric/gynecologic decision-making.