Testing period blood for signs of cervical cancer could be an accurate and convenient way of screening for the disease, researchers say. The current NHS test involves a nurse or doctor taking a sample of cells from the cervix - but a third of women invited for screening do not attend. A study of the new test, which can be carried out at home, used blood collected on a cotton strip attached to a standard sanitary pad. Cervical cancer charities say finding new and potentially gentler ways of