在月经周期的排卵阶段没有增加的内生避免
Iris J Holzleitner1,2, Julie C Driebe3, Ruben C Arslan4
1Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, UK.
Evolutionary human sciences
|August 17, 2023
概括
妇女对亲属的偏好在月经周期的肥沃阶段没有改变. 研究发现没有证据表明在排卵期间内生避免行为受到上调调节,这挑战了以前的假设.
科学领域:
- 进化心理学 进化心理学
- 人类生殖行为人类的生殖行为.
- 激素对社会行为的影响.
背景情况:
- 假设伴侣的偏好和行为在月经周期中发生变化,以提高生殖健康.
- 最近的大规模研究表明,以前报告的与激素相关的行为变化缺乏稳定性.
- 假设女性在排卵阶段对男性亲属的偏好进行下调调节,以防止近亲繁殖,在大型样本中仍然在很大程度上未经测试.
研究的目的:
- 研究女性类固醇激素水平的纵向变化与她们对表情与亲属关系线索的感知之间的关系.
- 为了检查女性是否减少与亲属,特别是男性亲属的社交互动,在他们的生育周期阶段.
主要方法:
- 研究1:评估女性对被操纵的亲属关系线索的面部感知,与受孕风险的荷尔蒙代理人相关.
- 研究2:利用日常日记来追踪妇女在整个月经周期中与亲属共度的时间.
主要成果:
- 女性认为有亲属关系的面孔更有吸引力和值得信赖,但这种看法与怀孕风险的荷尔蒙指标无关.
- 没有证据表明,女性在月经周期的肥沃阶段减少了与亲属,包括男性亲属相处的时间.
结论:
- 两项研究都没有提供证据支持这样的假设,即在月经周期的排卵阶段,避免近亲繁殖是上调调的.
- 这些发现挑战了女性的社会行为,特别是关于亲属偏好的观念,由与生育相关的荷尔蒙波动显著调节,以避免近亲繁殖.
更多相关视频
12:11Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes
Published on: May 11, 2017
11.0K
05:32Author Spotlight: Investigating the Relationship Between FSH and Pathophysiological Changes in Perimenopausal Women - Insights from a Mouse Model
Published on: August 11, 2023
1.8K
相关概念视频
01:27Ovarian Cycle
1.4K
The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle...
1.4K
02:07Oogenesis
63.8K
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...
63.8K
01:57Meiosis II
183.6K
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
183.6K
01:21Nondisjunction
3.9K
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...
3.9K
01:22Hormonal Regulation of the Menstrual Cycle
438
The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH...
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH...
438
01:30Hormonal Control of the Ovarian Cycle
568
The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
568