Using a complex model encompassing menstrual-cycle variables, smoking status, hormone levels, and ethnicity, these researchers estimated length of time to FMP, but they did not apply their model prospectively.

• 应用囊括月经周期变量、吸烟与否、激素水平和种族的复杂模型，研究人员估计了到达FMP的时间长短，但这并不适用于前瞻性模型。