Thanks to birth control pills and other hormonal contraceptives , a growing number of women are taking the path chosen by 22 - year - old stephanie sardinha . she has n ' t had a period since she was 17 据美联社5月21日报道，由于避孕药片和其他一些激素类避孕用具的帮助，美国现在有越来越多的女性开始选择一种新的生活方式。
Already , the seasonale birth control pill limits periods to four a year . the first continuous - use birth control pill , lybrel , likely will soon be on the u . s . market and drug companies are lining up other ways to limit or eliminate the period 美国的一种避孕药片已经能让月经改为“季经” ，即一年只有4次月经而首个可连续口服的避孕药片lybrel也将很快投入美国市场。
You ' re more likely to suffer from morning sickness if you have a history of nausea or vomiting from taking birth control pills , if you ' re susceptible to motion sickness or migraine headaches , if you ' re carrying twins or multiples , or if your mother or sisters had morning sickness 如果你曾经在服用避孕药后出现恶心或呕吐的副反应，或者使你属于孕吐或偏头疼易感人群，抑或你怀着双胞胎或多胞胎，还有你的母亲或姐姐也有过孕吐的症状，你出现孕吐的可能性会更高。
