The frequency of cervical cancer screening depends on several factors, including age, screening method, and previous screening results. Current guidelines recommend the following screening intervals for cervical cancer:

For Women Under 21 Years Old: Cervical cancer screening is not recommended for women under the age of 21, regardless of sexual history or HPV vaccination status. Most cases of cervical cancer occur in older age groups, and cervical cancer screening before age 21 is not beneficial and may lead to unnecessary interventions.

For Women Aged 21 to 29 Years Old: Women aged 21 to 29 should undergo cervical cancer screening with a Pap smear every three years. HPV testing is not routinely recommended in this age group unless indicated by abnormal Pap smear results.

For Women Aged 30 to 65 Years Old:
Co-testing (Pap smear and HPV test) every five years: Women aged 30 to 65 have the option of undergoing co-testing with a Pap smear and HPV test every five years. Co-testing offers increased sensitivity for detecting cervical abnormalities and may reduce the need for frequent screening.
Pap smear alone every three years: Alternatively, women in this age group may choose to undergo Pap smear screening alone every three years. If using this approach, HPV testing is not performed unless the Pap smear results are abnormal.

For Women Over 65 Years Old: Women over the age of 65 who have had regular cervical cancer screenings with normal results in the past may choose to stop screening altogether. However, women with a history of cervical cancer, precancerous lesions, or other risk factors may need continued screening beyond age 65.

After Hysterectomy: Women who have undergone a total hysterectomy (removal of the uterus and cervix) for reasons unrelated to cervical cancer (e.g., fibroids or endometrial cancer) generally do not need cervical cancer screening unless they have a history of cervical cancer or precancerous lesions.

It's important to note that these screening recommendations may vary slightly depending on individual factors, such as previous screening results, HPV vaccination status, and risk factors for cervical cancer. Women should discuss their specific screening needs and preferences with their healthcare providers to determine the most appropriate screening schedule for their situation. Regular cervical cancer screening is essential for early detection and prevention of cervical cancer.