Department of Obstetrics and Gynecology, Division of Obstetrics and Fetal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
Department of Obstetrics and Gynecology, Division of Obstetrics and Fetal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
Early Hum Dev. 2020 May;144:105027. doi: 10.1016/j.earlhumdev.2020.105027. Epub 2020 Apr 1.
The constancy of the number of cervical vertebrae in mammals is probably the result of selection against associated variations. A survey among patients with and without cervical ribs showed an association between miscarriage and the presence of cervical ribs. This supports the hypothesized selection against variations in cervical vertebral number.
哺乳动物颈椎数量的稳定性可能是对相关变异选择的结果。对有和没有颈肋的患者进行调查显示,流产与颈肋的存在之间存在关联。这支持了对颈椎数量变异的假设选择。