| Keyword | Most frequent expressions (number of websites) |
|---|---|
| iud | copper iud (2), iud effectiveness (2), innovative iud (1), iud patent (1), gynefix iud (1), iud product (1), frame iud (1), iud length (1), iud specifically (1), iud copper (1), device iud (1), small iud (1), iud size (1) |