甾体口服避孕药在美国和西欧各国均已广泛应用,据称效果良好。服药后的征象是无排卵而有月经,因此比较接近于生理状态,易为妇女所接受。副作用 Steroidal oral contraceptives are widely used in the United States and Western European countries and are reportedly effective. After taking the signs of anovulation without menstruation, so more close to the physiological state, easily accepted by women. side effect