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在六个子中产科的限制 Genera Monkey

Natalie M Laudicina1,2, Emma Piasecki1, Melissa Stoller3

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子的头皮制约有所不同,一些属如Callithrix,Cebus和Saimiri表现出比人类更紧张的胎儿头部到出生通道. 这些物种需要独特的出生机制来通过胎儿.

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科学领域:

  • 灵长类动物的生殖解剖学
  • 比较的产科和妇科.
  • 人类进化人类的进化.

背景情况:

  • 以前的研究表明,非人类猿类缺乏盆腔入口产科约束.
  • 在某些子属中,甚至在骨盆入口处也怀疑存在显著的头骨骨限制.
  • 了解产道尺寸对于比较生殖研究至关重要.

研究的目的:

  • 为了确定出生通道的真正最小尺寸在六个子属.
  • 将这些尺寸与胎儿头部尺寸进行比较,以确定产科约束.
  • 为了研究物种特异性适应胎儿在出生期间的穿越.

主要方法:

  • 来自六个子属的骨盆的数字化:阿特利斯,卡利希特里克斯,塞布斯,拉戈特里克斯,帕皮奥和赛米里.
  • 测量每个物种的出生通道内的最小尺寸.
  • 测量的骨盆尺寸与公布的胎儿头部尺寸的比较.

主要成果:

  • 盆腔入口不是出生通道的最窄点在任何研究的子属.
  • 最小的中腰尺寸始终在圣骨和阴茎之间发现.
  • 与其他属和人类相比,Callithrix,Cebus和Saimiri显示出胎儿的头部到分娩通道适合性明显更紧.

结论:

  • 属Callithrix,Cebus和Saimiri需要专门的出生机制,例如面对面的呈现和极端的骨盆带松.
  • 这些适应不同于人类的出生机制.
  • 人类双脚的适应可能推动了人类独特的产科策略的演变.