Biomaterial Database

A history of the measurement of unintended pregnancies and births. 2000

A A Campbell, and W D Mosher

Center for Population Research, National Institute of Child Health and Human Development, National Institutes of Health, USA. campbaa@cs.com

OBJECTIVE This article reviews the history of the measurement of unwanted and unintended pregnancy in fertility surveys in the United States. These concepts were developed in order to help explain trends and differences in birth rates in the United States. BACKGROUND Unwanted fertility was first measured systematically in a survey in Indianapolis in 1941. The first national surveys to measure the concept of unwanted fertility were the 1955 and 1960 Growth of American Families Studies. All three of these surveys were limited to married women. In the 1965 National Fertility Survey, the concept of mistimed births was introduced. The 1973, 1976, 1982, and 1988 National Survey of Family Growth (NSFG) continued to measure trends in unwanted and mistimed fertility, while expanding the population interviewed, from currently married to all marital statuses. The 1993 and 2001 NSFGs have enriched the data on wantedness with new measures of ambivalence and the strength of feelings about having children. CONCLUSIONS Measures of unwanted fertility, while imperfect, have been useful and will continue to be improved in the future.

UI	MeSH Term	Description	Entries
D007086	Illegitimacy	The state of birth outside of wedlock. It may refer to the offspring or the parents.	Legitimacy,Pregnancy, Premarital,Premarital Pregnancy,Unmarried Fathers,Unmarried Mothers,Father, Unmarried,Fathers, Unmarried,Mother, Unmarried,Mothers, Unmarried,Pregnancies, Premarital,Premarital Pregnancies,Unmarried Father,Unmarried Mother
D007407	Interviews as Topic	Works about conversations with an individual or individuals held in order to obtain information about their background and other personal biographical data, their attitudes and opinions, etc. It includes works about school admission or job interviews.	Group Interviews,Interviewers,Interviews, Telephone,Oral History as Topic,Group Interview,Interview, Group,Interview, Telephone,Interviewer,Interviews, Group,Telephone Interview,Telephone Interviews
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011275	Pregnancy, Unwanted	Pregnancy, usually accidental, that is not desired by the parent or parents.	Unwanted Pregnancies,Pregnancies, Unwanted,Unwanted Pregnancy
D001723	Birth Rate	The number of births in a given population per year or other unit of time.	Natality,Age-Specific Birth Rate,Age-Specific Fertility Rate,Fertility Rate,Age Specific Birth Rate,Age Specific Fertility Rate,Age-Specific Birth Rates,Age-Specific Fertility Rates,Birth Rate, Age-Specific,Birth Rates,Fertility Rate, Age-Specific,Fertility Rates,Natalities,Rate, Age-Specific Fertility,Rate, Birth,Rate, Fertility
D003267	Contraception	Prevention of CONCEPTION by blocking fertility temporarily, or permanently (STERILIZATION, REPRODUCTIVE). Common means of reversible contraception include NATURAL FAMILY PLANNING METHODS; CONTRACEPTIVE AGENTS; or CONTRACEPTIVE DEVICES.	Birth Control,Contraceptive Methods,Female Contraception,Fertility Control,Inhibition of Fertilization,Male Contraception,Contraception, Female,Contraception, Male,Contraceptions, Female,Contraceptions, Male,Contraceptive Method,Female Contraceptions,Fertilization Inhibition,Male Contraceptions
D003625	Data Collection	Systematic gathering of data for a particular purpose from various sources, including questionnaires, interviews, observation, existing records, and electronic devices. The process is usually preliminary to statistical analysis of the data.	Data Collection Methods,Dual Data Collection,Collection Method, Data,Collection Methods, Data,Collection, Data,Collection, Dual Data,Data Collection Method,Method, Data Collection,Methods, Data Collection
D005191	Family Characteristics	Size and composition of the family.	Family Size,Couples,Family Demography,Family Life Surveys,Family Size, Average,Family Size, Completed,Family Size, Desired,Family Size, Expected,Family Size, Ideal,Family and Household,Generations,Head of Household,Households,One-Person Household,Average Family Size,Average Family Sizes,Completed Family Size,Completed Family Sizes,Demography, Family,Desired Family Size,Desired Family Sizes,Expected Family Size,Expected Family Sizes,Family Characteristic,Family Demographies,Family Life Survey,Family Sizes,Family Sizes, Ideal,Household,Household Head,Household Heads,Household and Family,Household, One-Person,Ideal Family Size,Ideal Family Sizes,One Person Household,One-Person Households,Survey, Family Life