对其病因学的研究，旨在指导临床预防和治疗，提高生育力，缓解低雌激素水平所致的并发症。
The researches on the etiology aim at guiding clinical prevention and treatment, improving fertility and alleviating the complications that the low estrogen level causes.
通过记录69名妇女在高和低生育率阶段的声音，研究人员发现，随着生育力上升，音调会变高。
Researchers recorded the voices of 69 women during high - and low-fertility phases and found that as fecundity climbs, so does pitch.
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