Final answer:
Early changes of cervical cancer can be detected through a Pap smear, a highly effective screening test that examines cells from the cervix for abnormal changes.
Step-by-step explanation:
The early changes of cervical cancer can be detected through a Pap smear. During a Pap smear, a doctor collects a small sample of cells from the cervix and sends it to a medical lab for examination. The cells are stained and examined under a microscope for any abnormal changes that could indicate the presence of cervical cancer.
The Pap smear is a highly effective screening test that can detect pre-cancerous changes in the cervix. If pre-cancerous cells are detected, further tests such as a biopsy may be done to confirm the results. Regular Pap smears are recommended for early detection and prevention of cervical cancer.