نتایج جستجو برای: paternal age
تعداد نتایج: 762716 فیلتر نتایج به سال:
background: androgen insensitivity syndrome (ais) or testicular feminization is a partial or complete inability of cell response to androgen. the cause is enzymatic defect in synthesis of testosterone, resulting sexually immature phenotypically female, with primary amenorrhea. there are three categories of ais, complete, partial and mild, depending on the degree of external genital masculinizat...
BACKGROUND A consistent association between paternal age and their offspring's risk of schizophrenia has been observed, with no independent association with maternal age. The relationship of paternal and maternal ages with risk of bipolar affective disorders (BPAD) in the offspring is less clear. The present study aimed at testing the hypothesis that paternal age is associated with their offspr...
The children of older fathers have increased risks of developing schizophrenia spectrum disorders, and among those who develop these disorders, those with older fathers present with more severe clinical symptoms. However, the influence of advanced paternal age on other important domains related to schizophrenia, such as quantitative endophenotype deficit levels, remains unknown. This study inve...
OBJECTIVE To investigate the association of paternal age at conception with the risk of offspring developing schizophrenia. DESIGN A population based cohort study. SETTING Sweden. SUBJECTS 754,330 people born in Sweden between 1973 and 1980 and still alive and resident in Sweden at age 16 years. MAIN OUTCOME MEASURES Hospital admission with schizophrenia or non-schizophrenic, non-affect...
Mammals commonly avoid mating with maternal kin, probably as a result of selection for inbreeding avoidance. Mating with paternal kin should be selected against for the same reason. However, identifying paternal kin may be more difficult than identifying maternal kin in species where the mother mates with more than one male. Selection should nonetheless favour a mechanism of paternal kin recogn...
Background: Several epidemiologic studies indicate that some paternal occupations are associated with an increased risk of birth defects in offspring. Possible associations between paternal exposures and cardiovascular malformations were evaluated in previous studies. Material and methods: The case-control study was performed during an academic year between October 1999 and 2000. All children ...
Objective: The study aimed to compare intracytoplasmic sperm injection (ICSI) outcome of patients with epididymal sperm and testicular sperm in different paternal age with obstructive azoospermia. Methods: We retrospectively studied the records of 177 men with obstructive azoospermia who underwent sperm retrieval for ICSI. 71 cases were performed with testicular sperm aspiration (TESA), 106 cas...
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