Results 201 to 210 of about 5,793,459 (255)

Maternal age in trisomy

Annals of Human Genetics, 1988
SummaryBy comparison with a more general theory, data on trisomy in live births, amniocenteses, and spontaneous abortions by year of maternal age are shown to fit a logistic augmented by a proportion independent of maternal age. The frequency of trisomy increases monotonically, with no discrepancy at extremely low or high maternal age.
N E, Morton, P A, Jacobs, T, Hassold, D, Wu   +3 more
openaire   +2 more sources

Maternal Age and Children's Ability

Perceptual and Motor Skills, 1978
Associations of maternal age at birth and subsequent intelligence test scores of children were examined in a series of over 1500 young men from the Netherlands. All subjects were members of 2-child families and were resident in Amsterdam at age 19 yr. Possible confounding by birth order, spacing interval, social class and sex of sibling were considered.
P, Zybert, Z, Stein, L, Belmont
openaire   +2 more sources

Decreased maternal age with hydranencephaly

American Journal of Medical Genetics, 1997
We studied parental ages of institutionalized children with hydranencephaly. Mothers under age 20 years and under age 18 years were, respectively, 5 and 10 times as frequent as in the general population, and 3 and 4 times more frequent than for institutionalized control patients.
M S, Lubinsky, W, Adkins, E G, Kaveggia
openaire   +2 more sources

Maternal age and traits in offspring

Nature, 2000
The timing of a mouse's first litter influences the development of her pups. We have investigated the effect of the age at first pregnancy in mice on maternal steroid hormone levels and how these influence the growth and sexual maturation of their pups.
M H, Wang, F S, vom Saal
openaire   +2 more sources

Maternal age-specific drivers of severe maternal morbidity

American Journal of Obstetrics & Gynecology MFM, 2022
The maternal age influences the risk of adverse pregnancy outcomes, including severe maternal morbidity. However, the leading drivers of severe maternal morbidity may differ between the maternal age groups.To compare the contribution of different risk factors to the risk of severe maternal morbidity between various maternal age groups and estimate ...
Rebecca C. Carr, David N. McKinney, Amy L. Cherry, Emily A. Defranco   +3 more
openaire   +2 more sources

Alzheimer's Disease and Maternal Age

Journal of the American Geriatrics Society, 1982
Findings from several studies suggest a relationship between Alzheimer's disease and0020Down's syndrome. It has long been known that advanced maternal age is a risk factor for Down's syndrome, and that mothers who give birth to a child with this syndrome have characteristics consistent with accelerated aging.
D, Cohen, C, Eisdorfer, J, Leverenz
openaire   +2 more sources

Reproduction at an advanced maternal age and maternal health

Fertility and Sterility, 2015
Advanced age is a risk factor for female infertility, pregnancy loss, fetal anomalies, stillbirth, and obstetric complications. These concerns are based on centuries-old observations, yet women are delaying childbearing to pursue educational and career goals in greater numbers than ever before.
openaire   +2 more sources

Maternal age and duration of labor

Acta Obstetricia et Gynecologica Scandinavica, 1994
The computerized records of a population of 7214 women who were delivered during the period 1987‐1991 were analysed. We studied the possible relationship of the duration of the first and second stages of labor to maternal age. In para 0, para 1 and para 2+ mothers we found an independent positive correlation between the second stage duration and ...
S, Rasmussen, L, Bungum, K, Høie
openaire   +2 more sources

Maternal Age and Parental Loss

British Journal of Psychiatry, 1968
Maternal age at parturition, birth order, and parental loss have all been extensively investigated as possible causal or concomitant factors in a wide variety of mental disorders. Thus, to take an extreme example, the influence of maternal age on one of the two main kinds of mongolism is well known and can hardly have other than a biological ...
openaire   +4 more sources

Down's Syndrome and Maternal Age

Nature, 1969
THE risk of producing offspring with mongolism (Down's syndrome) increases abruptly with maternal age after the age of 30. German1 argued that a decreasing frequency of coitus with age, and an increase in the average interval between the follicular release and the fertilization of the female germ cell, might account for the observed age dependence.
openaire   +2 more sources