Four-Tiered Categorization of Contraceptive Method Eligibility in the World Health Organization's Medical Eligibility Criteria for Contraceptive Use11
| Category | Description |
|---|---|
| 1 | A condition for which there is no restriction for the use of the contraceptive method |
| 2 | A condition where the advantages of using the method generally outweigh the theoretical or proven risks |
| 3 | A condition where the theoretical or proven risks usually outweigh the advantages of using the method |
| 4 | A condition which represents an unacceptable health risk if the contraceptive method is used |