4 . to measure the expression of follicle stimulating hormone receptor ( fsh - r ) on cultured granrlosa cells and to study the correlation between the expression and ivf - et outcome ; to investigate the physiological mechanism of reactivity of the ovary to productive hormones in order to give a rich theoretic base on coh 4 、测定培养的颗粒细胞上fsh - r的含量，并研究其与ivf - et结果的相关性，从而进一步探讨卵巢对促性腺激素反应性的生理机制，为控制超排卵方案提供更广泛的理论基础。
