概括
孕妇在怀孕早期使用性激素可能会增加婴儿食道缩的风险. 然而,与非避孕性性激素暴露相关的绝对风险仍然很低.
科学领域:
- 产科和妇科 产科和妇科
- 儿科手术 儿科手术
- 医学遗传学 医学遗传学
背景情况:
- 在怀孕初期,母亲使用外源性激素被怀疑与先天性形有关.
- 现有的研究表明存在潜在的联系,需要进一步研究特定的激素类型和形.
研究的目的:
- 调查第一季度性激素暴露与婴儿先天性形之间的关联.
- 识别特定的激素类型及其与特定形的相关性.
主要方法:
- 进行了一项病例控制研究,涉及1,091名被诊断患有唐氏综合征或11种主要形之一的婴儿.
- 患有其他发育不良的婴儿作为每个特定发育不良类别的对照.
- 分析的重点是母亲在头三个月内暴露于各种性激素.
主要成果:
- 在食道缩和暴露于任何性激素 (OR,2.84),孕激素 (OR,2.87),未指定的性激素 (OR,2.99) 和激素妊娠测试 (OR,2.81) 之间观察到一个统计学上显著的关联.
- 对于这些关联,没有发现任何混变量.
- 在任何形和口服避孕药暴露之间没有发现显著的关联.
结论:
- 非避孕性激素暴露,特别是孕激素和激素怀孕测试,与食道缩的风险增加有关.
- 尽管观察到这种关联,但这种暴露导致食道缩的绝对风险很低,估计约为每10,000名活产婴儿中有6名.
- 在怀孕第一季度使用口服避孕药并没有与所研究的发育不良有显著的关联.
更多相关视频
08:28Assessment of the Effects of Endocrine Disrupting Compounds on the Development of Vertebrate Neural Network Function Using Multi-electrode Arrays
Published on: April 26, 2018
07:08Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
Published on: March 6, 2018
相关概念视频
Spermatogenesis
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
Oogenesis
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...
Sex-linked Disorders
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.Y chromosome mutations are called “Y-linked” and only affect males since they alone carry a copy of that chromosome. Mutations to the relatively small Y chromosome can impact male sexual function and secondary sex characteristics. Y-chromosome infertility is a disorder that affects sperm...
Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Sex Linked Disorders
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.Y chromosome mutations are called “Y-linked” and only affect males since they alone carry a copy of that chromosome. Mutations to the relatively small Y chromosome can impact male sexual function and secondary sex characteristics. Y-chromosome infertility is a disorder that affects sperm...
Teratogenicity
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
