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Conception Date

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Journal Article
Demography (1967) 4 (2): 673–679.
Published: 01 June 1967
...; and for the highest socioeconomic quintile census tracts, Baltimore, 1952–56. However, shifting the birth rates back forty weeks to approximate conception dates revealed no association with the observed coital rates. If the pattern presented has great generality, seasonal variations in births cannot be explained...
Image
Published: 02 July 2018
of the number of conceptions that survive to birth in week 0. The gray shading highlights the approximated week of conception. The natality data have date of last menses beginning in 1969, which we use to infer week of conception. We assume that the week of conception is two weeks after the reported date More
Journal Article
Demography (1966) 3 (2): 566–573.
Published: 01 June 1966
... in the Standard Certificate of Live Birth and in the Standard Certificate of Fetal Death. An item on education of father and mother will provide detailed national data on education and fertility. The date of the last live birth to the mother and the date of the last fetal death will provide information...
Image
Published: 05 December 2019
Fig. 4 Imperfect synthetic controls. The black dashed vertical line in panel a is at November 2013, which is the last conception date for which women would have been exposed for at least one trimester to the new water supply. The black bar in panel b displays the average treatment effect (ATE More
Journal Article
Demography (1972) 9 (4): 569–587.
Published: 01 November 1972
...Judith Blake; Prithwis Das Gupta Abstract Explicit policy to control fertility in the United States to date has focussed on the “unmet need” for contraceptive services in 1966 among an estimated five million poor and near-poor women. This paper reestimates the number of women in need...
Journal Article
Demography (1972) 9 (1): 1–11.
Published: 01 February 1972
..., it is possible to estimate the “life expectancy” and “half-life” of an IUD. Another important concept is the “cut-off date”, introduced in estimating the “life expectancy” because in practice no IUD will be worn by a woman forever. 30 12 2010 © Population Association of America 1972 1972 Life...
Journal Article
Demography (1974) 11 (2): 301–319.
Published: 01 May 1974
..., which was taken from the United Nations study The Concept of a Stable Population . Period life tables and vital rates for intercensal periods were generated from the new estimates of the black population at each census date. The results of this study are highly compatible both with the life tables...
Journal Article
Demography (1968) 5 (1): 34–44.
Published: 01 March 1968
...K. Srinivasan Summary The open birth interval has been defined as the interval of time since the last live birth to the date of survey for a woman married and in the reproductive age group at the time of the survey. Some empirical studies have indicated the potential advantages of this interval...
Journal Article
Demography (2021) 58 (4): 1423–1443.
Published: 01 August 2021
... measures has received very limited attention to date, resulting in a growing demand for the validation of existing perceived health measures using samples of natives and immigrants and establishing measurement equivalence of health-related assessment tools. This study, therefore, aims to examine...
FIGURES
Includes: Supplementary data
Image
Published: 05 December 2019
Fig. 3 Synthetic control results for general fertility rates. The black vertical line in panel a is at November 2013, which is the last conception date for which women would have been exposed for at least one trimester to the new water supply. The black vertical line in panel b represents More
Journal Article
Demography (2020) 57 (4): 1459–1481.
Published: 08 June 2020
... the unemployment level in the child’s county of residence during the 15 months following the estimated conception date. These added controls can proxy for possible economic fluctuations faced by each child’s parents during and following the gestation period. 21 Results from this analysis can be found in Table...
Includes: Supplementary data
Journal Article
Demography (2016) 53 (6): 1693–1715.
Published: 01 November 2016
... of all legal divorces. Using mothers’ and fathers’ names from the birth certificate data, and brides’ and grooms’ names from the marriage license data, we first matched birth and marriage records in order to identify when parents married relative to the child’s conception date (determined using...
FIGURES
Journal Article
Demography (1992) 29 (2): 305–318.
Published: 01 May 1992
... with potentially serious implications for analyses of conception intervals and child survival. Division of the birth interval into the conception interval and the period of gestation requires knowledge of the conception date, Birth Spacing and Child Mortality in Bangladesh and the Philippines 307 Table 1...
Journal Article
Demography (2002) 39 (2): 311–329.
Published: 01 May 2002
... forces is the emergence of nonmarital childbearing as an option of family formation (Wilson 1987). In this article, we draw from recent theoretical developments to identify and eluci- date the determinants of nonmarital childbearing. To be precise, this article is concerned with the timing of conceptions...
Journal Article
Demography (1986) 23 (1): 31–52.
Published: 01 February 1986
... the pace of reproduction with infant mortality. In this paper we used estimated dates of conception and consider live births only. 3 METHODS OF ESTIMATION OF THE EFFECTS OF PACE OF CHILDBEARING AND BREASTFEEDING ON INFANT AND EARLY CHILDHOOD MORTALITY An extensive discussion of strategies to resolve...
Journal Article
Demography (1981) 18 (4): 487–509.
Published: 01 November 1981
..., consisting of date of marriage, date of each conception, date of sterilization (if relevant) and date of interview. Given the division of conceptions into intended and unintended, the former were further classified by whether contraception was used in the-interval preceding conception and, if so, whether use...
Journal Article
Demography (1989) 26 (3): 425–437.
Published: 01 August 1989
... period. The conception date was reported as the date of last menstrual period. Only pregnancies that began during the period of observation and in which the conception occurred to women who had already resumed menses during the postpartum period or who had not reported ever being pregnant previously were...
Journal Article
Demography (2013) 50 (6): 2151–2171.
Published: 25 July 2013
... the month of delivery, using the exact date of birth and gestational age at birth (reported on the long-form birth certificate) to calculate the date of conception. Birthrates for each county-month are calculated as the number of births conceived that month in that county to women in that age and race group...
Journal Article
Demography (1993) 30 (4): 653–681.
Published: 01 November 1993
.... For every marriage, the last conception interval will always be open (censored by either the last survey date or the end of the marriage). Therefore the first form of duration dependence is a set of piecewise linear splines in time since marriage or time since last birth, respectively, denoted in each case...
Journal Article
Demography (2019) 56 (6): 2005–2031.
Published: 05 December 2019
...Fig. 4 Imperfect synthetic controls. The black dashed vertical line in panel a is at November 2013, which is the last conception date for which women would have been exposed for at least one trimester to the new water supply. The black bar in panel b displays the average treatment effect (ATE...
FIGURES | View All (5)
Includes: Supplementary data