Video Experimental Relacionado
Updated: Sep 9, 2025
09:03
Semiconductor Sequencing for Preimplantation Genetic Testing for Aneuploidy
Published on: August 25, 2019
9.5K
La edad fértil óptima y el intervalo entre nacimientos en China: un estudio de cohorte retrospectivo multicéntrico
Zhijia Zhao1,2, Hui Zhu3, Hongyi Liu2
1Medical Record Statistics Room, Affiliated People's Hospital of Ningbo University, Ningbo, China.
BMC public health
|August 30, 2025
Resumen
La edad óptima para tener hijos es de 27 años, con un intervalo de 3 años entre los nacimientos para minimizar riesgos como anemia y preeclampsia. El retraso en el parto aumenta los resultados adversos para la madre y el recién nacido.
Área de la Ciencia:
- Obstetricia y ginecología
- Medicina materna y fetal
- Salud Reproductiva
Sus antecedentes:
- La edad materna al momento del parto está aumentando.
- Las prácticas de espaciado de nacimiento influyen significativamente en los resultados del embarazo.
Objetivo del estudio:
- Analizar el impacto de la edad materna y el espaciado nacimiento en los resultados adversos maternos y neonatales.
- Para identificar las edades fértiles óptimas y los intervalos entre embarazos.
Principales métodos:
- Análisis de 151,301 embarazos en China (2010-2021).
- Utilizó la regresión del punto de unión para evaluar las tendencias temporales.
- Se incluyeron datos emparejados para el primer y segundo embarazo de 8.222 mujeres.
Principales resultados:
- La edad media materna aumentó de 27.1 a 28.5 años entre 2010 y 2021.
- La edad óptima de procreación se identificó como 27 años; las edades < 27 y > 27 aumentaron los riesgos de anemia, bajo peso al nacer, preeclampsia y parto prematuro.
- La edad óptima primipara es de 26 años con un intervalo de nacimiento de 3 años; un intervalo más corto aumenta los riesgos de FGR, oligohidramnios, placenta previa, preeclampsia, LBW, nacimiento prematuro y PROM. Los espacios más largos aumentaron los riesgos de anemia, DMG, placenta previa, preeclampsia, TD, nacimiento prematuro y PROM.
Conclusiones:
- La maternidad se retrasa cada vez más.
- Aboga por tener hijos a edades óptimas y espaciando para mitigar los resultados adversos.
Videos de Conceptos Relacionados
03:09Meiosis I
41.3K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
41.3K
02:20Longitudinal Research
12.4K
Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
12.4K
01:21Nondisjunction
4.1K
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
4.1K
00:57Population Growth
25.7K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
25.7K
01:28Infertility in Females
401
Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of...
Endometriosis, a condition characterized by abnormal growth of...
401
02:07Oogenesis
64.3K
In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
64.3K