Data on U.S. morbidity and mortality trends related to oral contraceptive (OC) use (1955-1975) and Danish morbidity trends (1953-1972) are tabulated.  24 charts present data for:  1) the estimated number and minimum percentage of U.S. women, age 15-44, using OCs (1964-1976);  2) mortality rates from complications of pregnancy, childbirth, and the puerperium for U.S. women, age 10-49, by 5-year age groups (1955-1975);  3) mortality from malignant neoplasms of all sites, in both sexes, age 25 and older, by 5-year age groups (U.S., 1955-1975);  4) mortality from malignant neoplasms of all sites for females, age 25 and older, and males, age 1-4 and 20 and older, by 5-year age groups (U.S., 1955-1975);  6) the incidence of breast cancer in females, age 25-84, by 10-year age groups, using 3-year moving averages (Connecticut, 1955-1975, and Puerto Rico, 1955-1974);  7) the incidence of breast cancer in Danish women, age 20 and older, by 5-year age groups (1953-1972);  8) mortality from uterine cervical cancer in U.S. women, age 25 and older, by 5-year age groups (1955-1975);  9) incidence of uterine cervical cancer in Connecticut women, age 15-84, by 10-year age groups, using 3-year moving averages (1955-1975);  10) incidence of carcinoma in situ of the uterine cervix in Connecticut women, age 15 and older, by 10-year age groups, using 3-year moving averages (1955-1975);  11) incidence of invasive cancer of the uterine cervix among Connecticut women, age 15 or older, by 10-year age groups, using 3-year moving averages (1955-1975);  12) incidence of cancer of the uterine cervix among Puerto Rican women, age 15 and older, by 10-year age groups, using 3-year moving averages (1955-1974);  13) incidence of uterine cervical cancer among Danish females, age 25-79, by 5-year age groups (1953-1972);  14) mortality from cancer of the uterine corpus among U.S. women, age 35 and older, by 5-year age groups (1960-1975);  15) incidence of cancer of the uterine corpus among Connecticut and Puerto Rican women, age 25 and older, by 10-year age groups, using 3-year moving averages (1955-1975);  16) incidence of cancer of the uterine corpus among Danish females, age 25-79, by 5-year age groups (1953-1972);  17) mortality from cancer of the ovary, fallopian tube, and broad ligament in U.S. women, age 30 and older, by 5-year age groups (1955-1975);  18) incidence of cancer of the ovary among Connecticut and Puerto Rican women, age 15 and older, by 10-year age groups, using 3-year moving averages (1955-1975);  19) incidence of cancer of the ovary among Danish women, age 20 and older, by 5-year age groups (1953-1972);  and 20) mortality from primary cancer of the liver among U.S. women, age 30 and older, by 5-year age groups (1958-1975).