(3β,5α)-4,4-Dimethylcholesta-8,14,24-trien-3-ol is a follicular fluid meiosis-activating sterol (FF-MAS); a factor present in the pre-ovulatory follicle during the time of oocyte maturation. (3β,5α)-4,4-Dimethylcholesta-8,14,24-trien-3-ol has been shown to protect young oocytes from precocious chromatid separation as well as protecting aged oocytes from predivision during maturation.