Objective: To discuss the change of estradiol (E2) and progestin (P) in serum of premenstrual syndrome (PMS) with liver-Qi invasion and the effect of Jingqianping granule on E2, P.

• 摘要目的：探讨经前期综合征肝气逆证患者血清雌二醇(E2)、孕酮(P)变化及经前平颗粒（以下简称经前平）对E2、P峰值的影响。