Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 125 for “"Maternal age"”.
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Qualitative and Quantitative Fitness Consequences of Advanced Maternal Age
<p>Parental age can affect offspring fitness across taxa and through various mechanisms. However, the effect(s) of advanced maternal age on offspring, particularly in insects, has not been comprehensively reviewed making it difficult to draw conclusions about the effects of advanced maternal age on …
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Maternal Age: Influence on Length of Gestation and Birth Weight
… indicated no significant differences among the age groups in relation to infant birth weight nor in relation to the risk factors of smoking, maternal weight gain, trimester of first entry into prenatal care, or marital status They did indicate a significant difference [F(2,85) = 4.1364, p < .05] …
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Transgenerational Effects of Maternal Age on Offspring Fitness in Crickets
<p>Advanced parental age is an important aspect of parental condition that can have both positive and negative effects on offspring fitness, and thus, parental age can be considered a parental effect. As a parental effect, parental age may affect a variety of offspring traits and may cascade to …
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Investigating the opinions on telephonic advanced maternal age genetic counselling
… settings such as South Africa. The advanced maternal age (AMA) telephonic GC service at Groote Schuur Hospital (GSH), has been implemented since COVID-19 regulations were enforced in 2020. This study aims to investigate the opinions and experiences of the patients on this telephonic service. …
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The impact of advanced maternal age on endometrial differentiation and placental development
Maternal age is a significant risk factor for adverse pregnancy outcomes, and is strongly associated with an increased risk of aneuploidy of the conceptus, as well as a significantly higher frequency of serious pregnancy complications known as the “Great Obstetrical Syndromes”, including …
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The association of young maternal age and low socioeconomic status with poor birth outcomes in urban British Columbia
… decline in births to women less than 20 years of age in both the United States and Canada, births to young mothers remain of particular interest. Infants born to teenaged mothers have been found to have elevated rates of various poor birth outcomes, which throughout their lives continue to put …
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Effects of cannibalism, maternal age and varying fish selectivity in age structured models of deep water hake populations
An Age Structured Model (ASM) was develop in which dynamic and density-dependent cannibalism was included as a top-down control on a modeled population of M. paradoxus which used spawner biomass and maternal based recruitment. The ASM was used to evaluate the effects cannibalism had on age …
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STUDIES IN OOCYTES FROM THREE MAMMALIAN SPECIES DEMONSTRATE THAT MEIOTIC KINETOCHORES ARE COMPOSED OF PREVIOUSLY UNIDENTIFIED SUBDOMAINS AND REVEAL TWO NOVEL MECHANISMS BEHIND THE MATERNAL-AGE EFFECT IN HUMANS
… eggs increases strikingly with advancing maternal age. Why egg quality declines dramatically as women approach their forties remains one of the outstanding questions in developmental biology. This PhD thesis demonstrates how unforeseen features of kinetochore organization that are unique …
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Teen, Optimal, and Advanced Age Mothers in Canada: Differences in Social Support, Parenting, and Child Behavioural Outcomes
The age range of first-time mothers in Canada is increasing, with an astonishing 195% increase in the number of women delaying their pregnancies after 35 years of age. However, the research around maternal and child outcomes usually focus on teen (under 19 years) and optimal age (20-34 years) …
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The relation between adolescent pregnancy and neonatal behavioral state
… this study was to examine the relation between maternal age and infant state. The behavioral state of 61 newborn infants was rated at 30-sec. intervals using Thoman's (1975) state scale during a one-hour observational session. The total number of epochs in quiet sleep, active sleep, alert, …
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Race differences in infant mortality
… focus is on race differences in the effects of maternal age, education, marital status, and prenatal care on the probability of an infant death and the likelihood of death due to a specific cause. Prenatal care and birthweight are included as intervening variables. A two part analysis is …
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A study of factors affecting the occurrence of down syndrome in Negeri Sembilan Malaysia
… fact of the high correlation between advanced maternal age and the risk of Down syndrome, genetic and socio- demographic factors of population are expected to have considerable effect on Down syndrome births. The main objective of this research was to assess the effect of genetic and …
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Relationship between having a child with a disability and/or chronic illness and family/child characteristics, family stress, and child enrichment opportunities
… (NLSY: 1986, 1988, 1990, 1992) the influences of maternal age, race, family structure, family/household size, residence, gender, birth order, family income, mother's education, occupation, job satisfaction, health limitations, availability of reading materials, activities of enrichment, and …
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Exploring the Relationship between Postpartum Anxiety and Ethnicity/Race: A Secondary Analysis of TriNetX Data
… for an exploration of how race, ethnicity, maternal age, prenatal anxiety, and prenatal depression diagnoses intersect to influence a Postpartum Anxiety diagnosis. This study aimed to investigate and quantify differences in PA rates across the following racial and ethnic groups: Black, …
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Exploring the Relationship between Postpartum Anxiety and Ethnicity/Race: A Secondary Analysis of TriNetX Data
… for an exploration of how race, ethnicity, maternal age, prenatal anxiety, and prenatal depression diagnoses intersect to influence a Postpartum Anxiety diagnosis. This study aimed to investigate and quantify differences in PA rates across the following racial and ethnic groups: Black, …
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The effect of previous preterm birth on the risk of recurrent preterm birth in Iceland 1997-2018
Background: Previous preterm birth and maternal age are known risk factors for preterm birth. Studies have shown a higher recurrence risk with a lower gestational age in the previous birth and that the clinical subtype of preterm birth is likely to recur. There is no current evidence regarding the …
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Associations of parental age, socioeconomic status, antral follicle count with assisted reproductive technology treatment outcomes
… issue. It is unclear whether advanced parental age, low socio-economic status (SES), and antral follicle count (AFC) are significantly and independently associated with adverse ART outcomes. There is little known about their interaction effects with an unhealthy lifestyle on adverse ART …
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Adverse obstetric outcomes in adolescent pregnancy in rural Zambia-the case of Kawambwa and Mansa Districts of Luapula Province
… The aim of this study was to investigate the maternal and perinatal outcomes among adolescents aged between 10 and 19years compared to older mothers aged between 20-24years delivering at selected health facilities in Kawambwa and Mansa. Methods: A retrospective cross-sectional analysis was …
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Clinical implementation of first trimester combined test for aneuploidies in patients aged 35 years or older
… to have an affected baby relates directly to maternal age. Invasive prenatal diagnosis based on advanced maternal age (AMA) alone is still a large contributor to invasive testing (amniocentesis and villocentesis). However, there are many reasons to abandon screening on the basis of AMA, given …
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Epidemiological, Environmental, and Biological Risk Factors for Gastroschisis
… indicate several risk factors including young maternal age, nulliparity, and low maternal body mass index, in addition to environmental factors and exposure, given the increase in global prevalence with a predisposition of cases to occur in clusters, and absence of a genetic link. We sought to …
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