Results 151 to 160 of about 3,961,344 (359)

Antioxidants and Male Fertility: From Molecular Studies to Clinical Evidence

open access: yesAntioxidants, 2019
Spermatozoa are physiologically exposed to reactive oxygen species (ROS) that play a pivotal role on several sperm functions through activation of different intracellular mechanisms involved in physiological functions such as sperm capacitation ...
D. Martín-Hidalgo   +4 more
semanticscholar   +1 more source

Dimorphic enantiostyly and its function for pollination by carpenter bees in a pollen‐rewarding Caribbean bloodwort

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Flowers that present their anthers and stigma in close proximity can achieve precise animal‐mediated pollen transfer, but risk self‐pollination. One evolutionary solution is reciprocal herkogamy. Reciprocity of anther and style positions among different plants (i.e., a genetic dimorphism) is common in distylous plants, but very rare in
Steven D. Johnson   +5 more
wiley   +1 more source

EFFECT OF THE SEX RATIO ON THE EGG FERTILITY OF MUSCOVY DUCK (CAIRINA MOSHCATA) [PDF]

open access: yes, 2005
Study was carried out for establishing the optimal sex ratio in Muscovy duck breeding. Four variants of the ratio of the male to the female individuals were tested: 1:5(I), 1:6(II), 1:7(III) and 1:8(IV).
Matina NICKOLOVA
core  

Identification of Compound Heterozygous CYP11A1 Variants via Reanalysis of Clinical Sequencing Data

open access: yesAmerican Journal of Medical Genetics Part A, EarlyView.
ABSTRACT A molecular diagnosis is currently achievable in approximately 50% of patients assessed by clinical geneticists at tertiary care centres. Next‐Generation Sequencing Panels contain a defined group of genes associated with a clinically defined set of phenotypes.
Ana Acosta Bedón   +10 more
wiley   +1 more source

Men's childbearing desires and views of the male role in Europe at the dawn of the 21st century [PDF]

open access: yes
The development of modern family patterns of the past decades has been accompanied by substantial changes in social norms, values and gender relations.
Allan Puur   +3 more
core  

The Arabidopsis ATK1 gene is required for spindle morphogenesis in male meiosis [PDF]

open access: yes, 2002
The spindle plays a central role in chromosome segregation during mitosis and meiosis. In particular, various kinesins are thought to play crucial roles in spindle structure and function in both mitosis and meiosis of fungi and animals.
Calzada, J. P. V.   +7 more
core  

Unveiling a New Link: Cholesterol Deficiency in Smith–Lemli–Opitz and Niemann–Pick C as a Driver of Ciliopathies

open access: yesAmerican Journal of Medical Genetics Part A, EarlyView.
ABSTRACT The ciliopathies are a group of genetic disorders caused by defective function of either the primary cilia (a large number) or the motile cilia (a much smaller number). These have been defined as diseases with mutations in genes encoding individual ciliary or cilia‐associated proteins.
Robert P. Erickson   +1 more
wiley   +1 more source

Where qualitative research meets demography: interdisciplinary explorations of conceptions on fatherhood in an extremely low fertility context [PDF]

open access: yes
Recent demands to include psychological theories of decision-making and intention-formation in research on family formation coincide with calls for improving research on male fertility and fatherhood.
Holger von der Lippe, Urs Fuhrer
core  

Longitudinal Behavior Phenotype Hallmarks in RNU4‐2 Syndrome: Implications for Clinical Management

open access: yesAmerican Journal of Medical Genetics Part B: Neuropsychiatric Genetics, EarlyView.
ABSTRACT Pathogenic variants in the non‐coding spliceosomal gene RNU4‐2 underlie ReNU syndrome, one of the most prevalent monogenic causes of neurodevelopmental disorders, accounting for ~0.4% of cases. Despite increasing recognition, little is known about the longitudinal behavioral and neuropsychiatric phenotype of affected individuals. We report two
Paola Francesca Ajmone   +8 more
wiley   +1 more source

The influence of employment uncertainty on childbearing in France: A tempo or quantum effect? [PDF]

open access: yes
This paper investigates whether unemployment and insecure employment periods merely delay fertility or also impact on completed fertility in France. It analyses both the timing of first childbearing and the fertility reached at age 40.
Anne Solaz, Ariane Pailhé
core  

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