Chromosome errors in human eggs shape natural fertility over reproductive life span.
Science
; 365(6460): 1466-1469, 2019 09 27.
Article
em En
| MEDLINE
| ID: mdl-31604276
ABSTRACT
Chromosome errors, or aneuploidy, affect an exceptionally high number of human conceptions, causing pregnancy loss and congenital disorders. Here, we have followed chromosome segregation in human oocytes from females aged 9 to 43 years and report that aneuploidy follows a U-curve. Specific segregation error types show different age dependencies, providing a quantitative explanation for the U-curve. Whole-chromosome nondisjunction events are preferentially associated with increased aneuploidy in young girls, whereas centromeric and more extensive cohesion loss limit fertility as women age. Our findings suggest that chromosomal errors originating in oocytes determine the curve of natural fertility in humans.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Oócitos
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Envelhecimento
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Segregação de Cromossomos
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Fertilidade
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Aneuploidia
Limite:
Adolescent
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Adult
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Child
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Female
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Humans
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article