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Journal of Biosocial Science

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https://www.readbyqxmd.com/read/28641583/prevalence-and-risk-factors-of-infertility-in-turkey-evidence-from-demographic-and-health-surveys-1993-2013
#1
Melike Sarac, Ismet Koc
The inability to have children affects couples worldwide and causes emotional and psychological distress in both men and women. Turkey is a country that lays particular emphasis on the issue of infertility, especially after experiencing a dramatic fertility decline over the last two decades. This study aimed to understand the changes in the prevalence of infertility in Turkey using three different approaches: the DHS Approach, the Constructed Approach and the Current Duration Approach. Furthermore, the factors contributing to elevated risks of infertility as derived from the Constructed Approach were investigated using four different logistic regression models...
June 23, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28625192/prolonged-birth-intervals-in-hamedan-iran-variations-and-determinants
#2
Amir Erfani, Marzieh Nojomi, Hatam Hosseini
The enduring sub-replacement level of fertility in Iran is the result of changing timing of births. Using data from the 2015 Hamedan Survey of Fertility, conducted in a representative sample of 3000 married women aged 15-49, this study examined variations in median lengths of birth intervals employing cumulative survival functions, and investigated the determinants of birth interval lengths using regression hazard models. The results showed that the median first, second and third birth intervals, estimated at 28, 74 and 136 months respectively, doubled between 1995 and 2015...
June 19, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28615082/differential-responses-in-first-birth-behaviour-to-economic-recession-in-the-united-kingdom
#3
Mark Lyons-Amos, Ingrid Schoon
Economic conditions have dramatic influences on fertility. This paper evaluates the effect of the 2008 'Great Recession' in the UK on first birth rate, which is the fertility behaviour most susceptible to external economic conditions. The key aim of the study was to assess the effect of the recession on fertility by individual-level characteristics, enabling variation in responses to economic hardship to be observed. Data were from the nationally representative UK Household Longitudinal Study (UK-HLS). Cumulative transition models were used to model the probability of first birth for women between the ages of 17 and 30 in three UK birth cohorts...
June 15, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28587684/caste-differentials-in-death-clustering-in-central-and-eastern-indian-states
#4
Mukesh Ranjan, Laxmi Kant Dwivedi, Rahul Mishra
This study assessed caste differentials in family-level death clustering, linked survival prospects of siblings (scarring) and mother-level unobserved heterogeneity affecting infant mortality risk in the central and eastern Indian states of Jharkhand, Madhya Pradesh, Odisha and Chhattisgarh. Family-level infant death clustering was examined using bivariate analysis, and the linkages between the survival prospects of siblings and mother-specific unobserved heterogeneity were captured by applying a random effects logit model in the selected Indian states using micro-data from the National Family Health Survey-III (2005-06)...
June 7, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28585514/consanguineous-marriages-among-iranian-mandaeans-living-in-south-west-iran
#5
Mostafa Saadat, Mahdis Zarghami
Several studies have indicated that consanguineous marriages (unions between biologically related persons) are associated with increased risk of autosomal recessive diseases and several multifactorial traits. Mandaeans are a closed ethno-religious community living in areas of southern Iraq and Iran (Khuzestan Province). There are currently no data on the prevalence of consanguineous marriages among Mandaeans. The present study was carried out in 2016 to determine the prevalence of consanguinity among Iranian Mandaeans living in Khuzestan Province, south-west Iran...
June 6, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28578743/to-what-extent-do-couples-pre-marital-communications-affect-their-post-marital-fertility-behaviour-in-india
#6
Sayantani Chatterjee, Anshul Kastor
Reproduction in India is mainly confined to within marriage. The fertility preferences of spouses will not necessarily be the same, but discussion between couples creates scope for understanding between spouses after marriage. Knowing each other's opinions facilitates decision-making on sensitive matters such as contraception use and desired family size. This study used data from the India Human Development Survey-II (2011-12), and was based on a sample of 31,276 currently married women. The aim was to understand the role of pre-marital communication, studied through the choosing of husbands, mutual communication before marriage and duration of time spouses knew each other before marriage on the fertility preferences of couples post-marriage...
June 5, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28578715/mediation-models-of-pregnancy-desires-and-unplanned-pregnancy-in-young-unmarried-women
#7
Warren B Miller, Jennifer S Barber, Heather H Gatny
This paper examines the proposition that sexual and contraceptive behaviours mediate the relationship between the pregnancy desires of young, unmarried women and their having an unplanned pregnancy. The sample consisted of 854 18- to 19-year-old women living in Michigan, USA. First, the positive and negative pregnancy desires of these women were measured, as were the women's perceptions of the positive and negative desires of their sexual partners. Then the extent to which these four types of desires, as well as several types of interactions between them, prospectively predicted the occurrence of subsequent pregnancies were tested with logistic regression analyses, initially alone and then after the addition of several types of sexual and contraceptive mediator variables...
June 5, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28578714/intimate-partner-violence-and-contraceptive-use-in-india-the-moderating-influence-of-conflicting-fertility-preferences-and-contraceptive-intentions
#8
Walter Forrest, Dharmalingam Arunachalam, Kannan Navaneetham
Several studies report that women exposed to intimate partner violence (IPV) are less likely to use contraception, but the evidence that violence consistently constrains contraceptive use is inconclusive. One plausible explanation for this ambiguity is that the effects of violence on contraceptive use depend on whether couples are likely to have conflicting attitudes to it. In particular, although some men may engage in violence to prevent their partners from using contraception, they are only likely to do so if they have reason to oppose its use...
June 5, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28566101/from-motives-through-desires-to-intentions-investigating-the-reproductive-choices-of-childless-men-and-women-in-poland
#9
Monika Mynarska, Jolanta Rytel
This study examined the potential of the theoretical model proposed by Warren Miller (the Traits/Motives-Desires-Intentions-Behaviour or TDIB model) for investigating the involuntary-voluntary childlessness continuum. The first three stages of the theoretical motivational sequence (motives to desires to intentions) were examined using a purposive sample of 314 childless Polish men and women aged 30-39 (at the time of data collection in September 2013). In Poland, this is the age range when the final decision for or against parenthood is taken...
June 1, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28502253/practice-of-consanguinity-and-attitudes-towards-risk-in-the-pashtun-population-of-khyber-pakhtunkhwa-pakistan
#10
Ruqiya Pervaiz, Faisal Faisal, Nedime Serakinci
This study aimed to investigate the frequency of consanguineous marriages and level of understanding of consanguinity-associated genetic risks in the Pashtun population, Pakistan. Information was gathered using a detailed questionnaire completed by 1500 individuals of both sexes over the 11-month period between April 2015 and February 2016. The mean inbreeding coefficient of the respondents was calculated and a five-point response scale was used to assess their understanding of consanguinity risks. The frequency of consanguineous marriages in the Pashtun population was found to be 58...
May 15, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28482949/predictors-of-male-circumcision-among-men-aged-15-35-years-in-harare-zimbabwe
#11
Kudzaishe Mangombe, Ishumael Kalule-Sabiti
Medical male circumcision has been recommended by the World Health Organization as part of a comprehensive approach to HIV prevention. Zimbabwe is one of the fourteen sub-Saharan countries that embarked on the Medical Male Circumcision (MMC) programme. However, the country has not yet met male circumcision targets. This paper examines the predictors of male circumcision in Zimbabwe. A cross-sectional survey was conducted on 784 men aged 15-35 years in Harare, Zimbabwe. Negative log-log logistic regression analysis was used to determine the predictors of male circumcision...
May 9, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28482934/longevity-in-north-korea-and-south-korea-prevalence-of-centenarians-in-one-the-poorest-and-one-of-the-richest-nations
#12
Daniel Schwekendiek
Over recent decades, economic living conditions have dramatically improved in South Korea, which now represents one of the most developed nations. At the same time, its twin in the North remains one of the poorest countries on earth. Thus, the Korean peninsula represents a unique historical experiment that allows for study of the effects of environment on human development under a variety of ceteris paribus cultural, genetic and climatic conditions. Previous studies comparing the biosocial performances of the two Koreas have focused on indicators such as weight, height, mid-upper arm circumference and age at menarche...
May 9, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28478765/gender-equality-and-the-gender-gap-in-mathematics
#13
Hung-Lin Tao, Christos Michalopoulos
A gender gap has been found in mathematics (boys outperform girls) that has prevailed across countries for many decades. Whether this gap results from nature or nurture has been hotly debated. Using the evidence of PISA 2003 and the gender equality index of 2003, some researchers have argued that an improvement in gender equality reduces the gender gap in mathematics. This study used five waves of country-level PISA data and, controlling for country fixed effects, found no evidence to support this argument...
May 8, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28416040/effect-of-early-sexual-debut-on-high-school-completion-in-south-africa
#14
A V Bengesai, H T A Khan, R Dube
Early sexual debut is of major concern because it is a correlate for health and economic shocks experienced in adulthood. In South Africa, this concern has provided impetus for research directed at the HIV and AIDS epidemic, teenage pregnancy and the effect of adolescent sexual behaviour on persistence in school. Of interest to the present study is high school completion, which is a well-established empirical barometer of adult socioeconomic opportunities. Using data from the five waves of the Cape Area Panel Study (CAPS), this paper examines the association between sexual behaviours initiated in pre- and early adolescence and high school completion rates...
April 18, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28416034/cohabitation-and-union-dissolution-in-central-uganda-differences-between-cohabitors-and-non-cohabitors
#15
Charles Lwanga, Ishmael Kalule-Sabiti, Natal Ayiga
The aim of this paper was to establish whether the differences in the risks of union dissolution between cohabitors and non-cohabitors in Uganda have converged over time using event history data. Data were collected in 2013 from 1200 women in central Uganda using retrospective methods. Of these, 839 provided information on three types of first union: women who married directly (without first cohabiting), those who married following cohabitation and those who were still cohabiting. The data were analysed using decrement lifetable analysis...
April 18, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28382871/timing-of-sexual-debut-among-unmarried-youths-aged-15-24-years-in-sub-saharan-africa
#16
Joshua Amo-Adjei, Derek Anamaale Tuoyire
This study aimed to contribute to the evidence on the timing of sexual debut in young people in sub-Saharan African countries. Data were extracted from 34 nationally representative surveys conducted in the region between 2006 and 2014. The study sample comprised unmarried women (n=167,932) and men (n=76,900) aged 15-24 years. Descriptive techniques and Cox proportional regression models were used to estimate the timing of sexual debut, and Kaplan-Meier hazard curves were used to describe the patterns of sexual debut in each country by sex...
April 6, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28367793/marriage-gap-in-christians-and-muslims
#17
Martin Fieder, Susanne Huber, Elmar Pichl, Bernard Wallner, Horst Seidler
For modern Western societies with a regime of monogamy, it has recently been demonstrated that the socioeconomic status of men is positively associated with being or having been married. This study aims to compare marriage patterns (if a person has been married at least once) for cultures with a tradition of monogamy and polygyny. As no worldwide data on polygyny exist, religion was used as a proxy for monogamy (Christians) vs polygyny (Muslims). The analyses were based on 2000-2011 census data from 39 countries worldwide for 52,339,594 men and women, controlling for sex, sex ratio, age, education, migration within the last 5 years and employment...
April 3, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28366175/maternal-activity-during-pregnancy-and-sexually-dimorphic-traits-in-offspring
#18
Lee Ellis, Russell Eisenman, Anthony Hoskin
Studies have found positive correlations between prenatal exposure to testosterone and masculinization of offspring traits, particularly among females. The present study sought to determine if physical or sexual activity by the mother during pregnancy was related to masculinized/defeminized offspring traits in adulthood. Data were obtained from a large sample of North American college students (offspring) and their mothers. Information about maternal activity levels during pregnancy were reported retrospectively by each mother...
April 3, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28285603/hiv-sti-risk-taking-sexual-behaviours-and-risk-perception-among-male-university-students-in-tehran-implications-for-hiv-prevention-among-youth
#19
Farideh Khalajabadi Farahani, Mohammad Mahdi Akhondi, Mehdi Shirzad, Ali Azin
Recent evidence indicates a rising trend in premarital sexual activity among young people in Iran. However, little is known about the extent to which young people's sexual behaviours expose them to HIV and STI risks. This study aimed to assess HIV/STI-related sexual risk-taking behaviours (correlates and determinants) and HIV/STI risk perception among male university students in Tehran. A representative sample of male university students (N=1322) studying in government and private Tehran universities completed an anonymous questionnaire survey in 2013-14...
March 13, 2017: Journal of Biosocial Science
https://www.readbyqxmd.com/read/28270256/socioeconomic-status-and-adverse-birth-outcomes-a-population-based-canadian-sample
#20
Emily E Campbell, Jason Gilliland, Paula D N Dworatzek, Barbra De Vrijer, Debbie Penava, Jamie A Seabrook
This study assessed the strength of the association between socioeconomic status (SES) and low birth weight (LBW) and preterm birth (PTB) in Southwestern Ontario. Utilizing perinatal and neonatal databases at the London Health Science Centre, maternal postal codes were entered into a Geographic Information System to determine home neighbourhoods. Neighbourhoods were defined by dissemination areas (DAs). Median household income for each DA was extracted from the latest Canadian Census and linked to each mother...
March 8, 2017: Journal of Biosocial Science
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