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Hawkes Kristen K Department of Anthropology, University of Utah, Salt Lake City, Utah 84112-0060, USA. - - 2010
Two kinds of evidence suggest that female fertility may end at an earlier age in modern people than in ancestral populations or in our closest living relatives, chimpanzees. We investigate both to see whether fertility schedules or ovarian follicle counts falsify the alternative hypothesis that the age of terminal fertility ...
Paasch Uwe - - 2010
A case-cohort study of 2,157 patients, aged 17-67 years was performed to assess the impact of body mass index and age on male fertility. Using a multiple regression analysis across the total cohort, only age correlated significantly with all spermiogram parameters and serum hormones, but in patients aged 20-30 years ...
Henretta John C - - 2010
This article examines the relationship between lifetime marital history and mortality after age 50. Data are drawn from the Health and Retirement Study birth cohort of 1931 to 1941. The analysis utilizes three measures of marital history: number of marriages, proportion time married, and age at first marriage. Three or ...
Balasch Juan - - 2010
In many modern societies, the proportion of women who delay childbearing beyond the age of 35 years has increased greatly in recent decades. They are falsely reassured by popular beliefs that advances in new reproductive technologies can compensate for the age-realted decline in fertility, but science cannot beat the biological ...
Walker Ruth - - 2011
Background: There is growing evidence for spousal associations in late-life development among key functional domains. Spousal interrelations in subjective well-being (SWB) have primarily been discussed in the context of a model of 'transmission', an indicator of well-being. Typically, depression is used to mark this, but few studies have examined if ...
Smith C C - - 2010
Species with alternative reproductive strategies are characterized by discrete differences among males in suites of traits related to competition for fertilizations. Models predict sneaker males should allocate more resources to their ejaculates because they experience sperm competition more frequently and often occupy a disfavoured 'role' owing to subordinance in intramale ...
Press David J DJ Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom. - - 2010
The first major case-control study, published by Janet Lane-Claypon in 1926, provided the first epidemiologic evidence that low fertility increases breast cancer risk. This study in the United Kingdom was replicated in 1931 by JM Wainwright using a US sample. Neither study used modern statistical inference to interpret their data. ...
England G C W - - 2010
Retrospective analysis was performed on semen collected from 24 dogs (parents: 14 Labrador retrievers and 10 Golden retrievers) aged between 16 and 28 months of age. The dogs were part of a large breeding programme but lived in the homes of volunteer families. The semen was subjected to a standardised ...
Speizer Ilene S - - 2011
The relationship between intimate partner violence (IPV) and early marriage is explored using the 2005-2006 India National Family Health Survey (NFHS-3). The NFHS-3 collected data from a representative sample of women and men in India with a large enough sample size to have a representative sample at the state level. ...
Hagenäs Isabella - - 2010
Cryopreservation of semen should be offered to adults before gonadotoxic treatment. However, the experience with semen collection in adolescents is still limited. The objective of this study was to evaluate potential correlates of successful semen sampling in adolescents. A total of 86 boys (aged 12.2-17.9 years), referred for cryopreservation of ...
de Graaff Aisha A - - 2011
To investigate the effect of the nationwide age shift toward later conception on the corresponding subfertile population. Observational study. General population, the Netherlands. Subfertile population, Maastricht University Medical Centre. Women delivering their first child, women entering fertility care. Between 1985 and 2008 the age of women at their first visit ...
Hallén Magnus - - 2011
Several animal studies have raised concern about the risk for obstructive azoospermia owing to vasal fibrosis caused by the use of alloplastic mesh prosthesis in inguinal hernia repair. The aim of this study was to determine the prevalence of male infertility after bilateral mesh repair. In a prospective study, a ...
Colin Alinne - - 2010
To evaluate the impact of age on the expression of apoptotic biomarkers in human spermatozoa. Cross sectional, prospective study. Academic centers. Healthy volunteers with proven fertility, stratified by age (n = 25, range: 20-68 years). Examination of serum hormone levels and basic semen parameters, and assessment of early (plasma membrane ...
Hammiche F - - 2011
Because of changes in the society, couples in Western countries are increasingly delaying reproduction. This is accompanied by unhealthy lifestyles that may be detrimental not only to general health but also to reproductive capacity. It is well known that maternal age has detrimental effects on fertility; the paternal influence on ...
Long J A - - 2010
The fertility rates of cryopreserved poultry semen are highly variable and not reliable for use in preservation of commercial genetic stocks. Our objective was to evaluate the cryosurvival of semen from 8 pedigreed layer lines at 2 different ages: the onset and end of commercial production. Semen from 160 roosters ...
Das Farida Ahmed - - 2010
Selection potential based on differential fertility and mortality has been computed for seven population groups inhabiting different geographical locations of Northeast India. Crow's as well as Johnston and Kensinger's index have been used for the present purpose. Irrespective of the methodology, the total index of selection was found to be ...
Weir Laura K - - 2010
Sperm limitation is widespread across many animal species. Several mechanisms of sperm allocation have been proposed, including optimal allocation according to clutch size and equal allocation across females. However, considerably less effort has been directed at investigating the behavioural signals associated with sperm limitation in males, which may include mating ...
Manier Mollie K - - 2010
Our understanding of postcopulatory sexual selection has been constrained by an inability to discriminate competing sperm of different males, coupled with challenges of directly observing live sperm inside the female reproductive tract. Real-time and spatiotemporal analyses of sperm movement, storage, and use within female Drosophila melanogaster inseminated by two transgenic ...
Hvidtfeldt Ulla A - - 2010
AIMS: The most commonly used indicator of fertility, the period total fertility rate (TFR(p)), tends to underestimate actual fertility when women delay childbearing. The objective of this study was to examine to which extent fluctuations in Danish fertility rates result from changes in timing of births and, thus, whether the ...
Suquet M - - 2010
Changes in sperm features during the movement phase are especially interesting to study in external fertilization species whose sperm duration movement is long because this implies a significant adaptation of moving cells to the external medium. This study describes the changes in tetraploid Pacific oyster sperm characteristics in relation to ...
Peippo J - - 2010
We studied whether bovine embryos developing after in vitro fertilization (IVF) with sex-sorted spermatozoa differed in developmental kinetics, quality and sex ratio from embryos produced with unsorted spermatozoa. Abattoir-derived oocytes were fertilized with X-sorted, Y-sorted or unsorted spermatozoa from a single bull. To evaluate economical use of the sex-sorted spermatozoa, ...
Larson J E - - 2010
This study tested the hypothesis that four inseminations of commercially frozen sexed semen (>or=2.1x10(6) sperm per 0.25-mL straw) in superstimulated embryo donors would yield a percentage and quantity of transferable embryos similar to that achieved with conventional frozen semen. Bos taurus, angus cows (n=32), stratified by age and body condition, ...
Vivas-Acevedo Giovanny - - 2010
To evaluate the effect of presence, grade and anatomical side of varicocele on semen parameters and to identify age-related modifications in semen quality in men with varicocele. A prospective clinical study was performed in 363 men with varicocele and 155 normozoospermic men without varicocele. We determined the presence, grade and ...
Xu Jin - - 2010
The determination of paternity of offspring produced by polyandrous females is essential for the understanding of sperm competition mechanisms. The sterile male technique using radiation is one of the most commonly employed methods for this purpose. However, sterilization using radiation is likely to be restricted by the equipment availability and ...
Wilson Ben - - 2010
The stability of couple partnerships is of continual interest to policy makers and many users of official statistics. This research used a sample of adults (from the Office for National Statistics Longitudinal Study) who were in a partnership (married or cohabiting) in the 1991 Census of England and Wales, and ...
Katz Karin - - 2010
This study investigated a potential independent association between hypovitaminosis D and suspected nonalcoholic fatty liver disease (NAFLD) in a nationally representative sample of the US adolescents. Data from 1630 subjects 12-19 years of age were examined using the National Health and Nutrition Examination Survey, 2001-2004. The vitamin D status of subjects ...
Akter Shamima - - 2010
Early cessation of breastfeeding is a cause of significant concern in many developing countries. Premature discontinuation of breastfeeding is known to be associated with avoidable childhood morbidity and mortality as well as high levels of parity and avoidable pregnancies. Using a publicly available demographic dataset from Bangladesh, we applied a ...
Ga??n Natalia - - 2010
The Iberian lynx (Lynx pardinus) is the most endangered felid in the world. Adequate genetic management of in situ and ex situ populations, and linkage between both, require knowledge on male reproductive biology and factors influencing it. We examined the influence of age, free-ranging versus captive conditions and seasonality on ...
Koskas Martin - - 2010
Objective. To study incidence of abnormal hysteroscopic findings according to age. Methods. We retrospectively studied 557 consecutive office hysteroscopies in patients referred for incapacity to conceive lasting at least 1 year or prior to in vitro fertilization. Rates of abnormal findings were reviewed according to age. Results. In 219 cases, ...
Ally Dilara - - 2010
From bacteria to multicellular animals, most organisms exhibit declines in survivorship or reproductive performance with increasing age ("senescence"). Evidence for senescence in clonal plants, however, is scant. During asexual growth, we expect that somatic mutations, which negatively impact sexual fitness, should accumulate and contribute to senescence, especially among long-lived clonal ...
Charlton Benjamin D - - 2010
Although female mammal vocal behaviour is known to advertise fertility, to date, no non-human mammal study has shown that the acoustic structure of female calls varies significantly around their fertile period. Here, we used a combination of hormone measurements and acoustic analyses to determine whether female giant panda chirps have ...
Wiser A - - 2009
The aim of this study was to evaluate the affect of age at the time of orchidopexy on testicular sperm extraction (TESE) results among patients with a history of cryptorchidism and azoospermia. This retrospective study compared TESE results for couples undergoing IVF treatment, among two groups of patients. Group A ...
Canavese F - - 2009
INTRODUCTION: Recent data has indicated the usefulness of performing orchiopexy in the first years of life. In this study, we evaluated testicular function in young men operated on for cryptorchidism in the first year of life. To our knowledge, this is the first report on the effects of such an ...
Beets Gijs - - 2009
Fertility curves sometimes resemble sea waves. During periods that the fertility age patterns change, according to whatever reason, 'this sea' may become very turbulent. Also other sea-like phenomena, for example tsunamis, are discernible in fertility behaviour. This article gives a short overview of the relationships between age of the mother ...
Cardona Maya W??lter - - 2009
Although the effect of maternal age on fertility is well known, it is unclear whether paternal age also affects fertility. The aim of this retrospective study was to establish an association between the age of the individuals from Medellin, Colombia with semen volume, rapid progressive motility (a), total progressive motility ...
Au Phil Chi Khang - - 2010
Induced ovulation maximizes captive breeding success, increasing productivity and facilitating the contribution of otherwise infertile animals to the genetic pool. In marsupials, induced ovulation to produce fertile young is unknown. Here we present an induction protocol efficient in inducing non-cycling and non-reproductive females to cycle, mate, ovulate, and conceive. Ovulation ...
Serour Gamal - - 2010
OBJECTIVE: To estimate the live-birth and miscarriage rates in 1-year age increments for women aged ≥40 years undergoing in vitro fertilization or intracytoplasmic sperm injection (ICSI-IVF) with autologous oocytes. DESIGN: Retrospective database and chart analysis. SETTING: Egyptian IVF and embryo transfer center. PATIENT(S): One thousand six hundred forty-five women aged ...
Kumar Davendra - - 2010
A study was conducted to evaluate the semen production and sperm motion characteristics of ram lambs by computer-aided semen analysis technique. Eight Malpura rams were raised under intensive management system and were trained for semen collection at a weekly interval from the age of 6 months. Rams were scheduled for ...
Rako L - - 2009
In insects including Drosophila melanogaster, females can overwinter at the adult stage by adopting a shallow reproductive diapause, but almost nothing is known about male reproductive diapause. In this study, we test for the maintenance of fertility in overwintering males from the eastern Australian D. melanogaster cline. Males from southern ...
La Vignera S - - 2009
Cryptorchidism is the most frequent defect of the male urogenital tract at birth. It represents a risk factor for primitive testiculopathy associated with long-term complications (infertility, testicular neoplasia, and hormonal changes). An only consensus exists: "children with bilateral cryptorchidism who are not treated in early age are certainly set to ...
Eltigani Eltigani E - - 2009
Egypt and Tunisia began their fertility transition at almost identical fertility levels and at roughly the same time period, yet the difference in the pace of decline has been such that the total fertility rate (TFR) in Tunisia reached replacement level by the year 2001, whereas the TFR in Egypt ...
Gögele Martin - - 2009
Stelvio, Martello and Curon, three villages of the Venosta Valley, South Tyrol (Italy), were recently included in a large genetic survey because of their isolation. This study focuses on the long-term reproductive behaviour of these villages. Family size, age at marriage and marital fertility were estimated based on a genealogy ...
Goff K - - 2009
To determine whether sperm derived from the vas deferens could be retrieved and successfully cryopreserved, testes were collected from 20 rhesus macaques (Macaca mulatta). The males ranged in age from 3 to 19 yr with an average age of 8.5 yr. No sperm was obtained from three animals that were ...
Wedell Nina - - 2009
Sexual conflict can promote rapid evolution of male and female reproductive traits. Males of many polyandrous butterflies transfer nutrients at mating that enhances female fecundity, but generates sexual conflict over female remating due to sperm competition. Butterflies produce both normal fertilizing sperm and large numbers of non-fertile sperm. In the ...
Cornwallis Charlie K - - 2009
An important predictor of male fitness is the fertilizing efficiency of their ejaculates. Ejaculates are costly to produce and males are predicted to devote greater resources to copulations with reproductively superior females. It is well established that males allocate different numbers of sperm to ejaculates. However, less is known about ...
Schneider M I - - 2009
Few ecotoxicological studies have used life table analysis to evaluate the toxicity of pesticides on beneficial organisms. This study is the first report of the effect of the herbicide glyphosate on a predator insect, Chrysoperla externa, using a demographic approach. This predator is associated to soybean pests and has a ...
Shenk Mary K - - 2009
Over the last three decades many authors have addressed the demographic transition from the perspective of evolutionary theory. Some authors have emphasized parental investment factors such as the costs of raising children, others have emphasized the effects of mortality and other forms of risk, and others have emphasized the biased ...
Hawkes Kristen - - 2009
A grandmother hypothesis may explain why humans evolved greater longevity while continuing to end female fertility at about the same age as do the other great apes. With that grandmother hypothesis in mind, we sought to compare age-specific mortality and fertility rates between humans and chimpanzees, our closest living relatives, ...
Chotirmall S H - - 2009
Infertility rates among males with cystic fibrosis (CF) approximate 97%. No information is currently available within Ireland determining an understanding of fertility issues and the best methods of information provision to this specialized group. This study aimed to determine understanding and preferred approaches to information provision on fertility issues to ...
Crawshaw M A - - 2009
Discussion and management of potential reproductive health sequelae of adolescent cancer are essential and challenging components of care for the multidisciplinary team. Despite this, research has been limited to specific experiences (e.g. sperm banking) or fertility-related concerns of adult survivors. This grounded theory study of 38 male and female survivors ...
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