OBSintermediate
Match each cervical ripening agent or mechanical method (1–4) with its correct mechanism or description (A–D): Methods: 1. Misoprostol 2. Dinoprostone 3. Laminaria japonicum 4. Foley catheter balloon Descriptions: A. Synthetic prostaglandin E1 (PGE1) analogue B. Synthetic prostaglandin E2 (PGE2) C. Natural hygroscopic osmotic dilator derived from seaweed D. Mechanical dilation via direct hydrostatic pressure on the internal cervical os
Answer
1-A, 2-B, 3-C, 4-D
Explanation
Misoprostol and dinoprostone are synthetic prostaglandins, respectively PGE1 and PGE2. *Laminaria japonicum* is a seaweed osmotic dilator; the Foley balloon mechanically applies pressure and dilates the cervix. Understanding these distinctions helps compare methods and their respective risks.
**Key takeaway:** Identify both the method category and mechanism for each ripening agent.
**Glossary:** **PGE1/PGE2**: prostaglandin E1/E2. **Balloon catheter**: a catheter with an inflatable balloon.
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