Immaculate conceptions in sub-Saharan Africa: exploratory analysis of inconsistencies in the timing of first sexual intercourse and first birth

Article Abstract:

Immaculate conceptions in sub-Saharan Africa arise from memory errors and the fact that many respondents relate their age to the onset of intercourse with the present partner rather than to the loss of virginity. Reports on having the first birth before the first sexual intercourse are erroneous, as conception is improbable without intercourse except in case of in vitro fertilization. An analysis of data from Demographic and Health Surveys indicate that errors due to differences in wording of questionnaire and differential data editing are also possible.

Author: Meekers, Dominique
Fertilization (Biology), Demographic surveys, Sub-Saharan Africa, Conception, Premarital sex, Conception (Human reproduction)

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Effect of maternal age on birth outcomes among young adolescents

Article Abstract:

Young adolescents have the maximum risk for negative birth results in a survey of maternal age and baby health. Univariate analyses suggest very premature and premature delivery, underweight and neonatal mortality as some of the dangers. The effect of maternal age on birth results in young adolescents in the age of 10 to 15 years has been examined. The study emphasizes on the need to enhance prevention efforts to minimize these risks.

Author: Alexander, Greg, Leland, Nancy Lee, Cooper, Leah G.
Evaluation, Influence, Birth defects, Teenage mothers, Maternal age

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Seasonality of birth in nineteenth-and twentieth-century Austria

Article Abstract:

This report examines the seasonal patterns in human births in nine regions within Austria between 1881-1912 and 1947-1959. In the earlier period, researchers found that seasonality of birth is influenced by geography, climate and agricultural patterns. These factors did not influence the second period, but the researchers propose a "resilience hypothesis" which suggests another level of causal influence.

Author: Doblhammer, Gabrielle, Rodgers, Joseph Lee, Rau, Roland
Austria, Statistical Data Included, Childbirth, Delivery (Childbirth), Reproduction (Biology), Reproduction, Seasonal variations (Biology)

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Subjects list: Social aspects, Analysis
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