Smear tests, also known as cervical screening tests, are generally recommended every 3 to 5 years depending on age and location. In the UK, people aged 25 to 49 are invited every 3 years, and those aged 50 to 64 every 5 years. In Scotland and Wales, and recently also in England, the interval is every 5 years for ages 25 to 64. For people aged under 25 or over 65, screening is usually not recommended unless there are abnormal results or symptoms. Similar guidelines apply in many other places, with typically every 3 years for ages 21 to 29 and every 3 to 5 years for ages 30 to 65, depending on test type and risk factors.