The third of six province-wide surveys of married women in Taiwan was conducted in 1970 to add to the information previously collected in 1965 and 1967 regarding women's knowledge of, attitudes toward, and practice of contraception. Data were again collected on family relations, fertility, and family planning. Changes in contraceptive knowledge and use were examined, and an additional sample of women married between 1967 and 1969 was added. Demographic information such as age, education, employment, and family history were collected for both husband and wife.