What causes a weak cervix?

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Tags

1. #curettage
2. #difficult
3. #malformed
4. #diethylstilbestrol
5. #uterus
6. #dilation
7. #exposure
8. #birth
9. #during
10. #trauma
11. #defect
12. #miscarriage
13. #cervix
14. #previous
15. #damage
16. #termination