Yutting refers to levonorgestrel tablets. Taking levonorgestrel tablets amenorrhea mainly consider two possibilities: pregnancy or endocrine disorders caused by amenorrhea, timely consultation to identify the causes of observation or drug treatment. 1. pregnancy: levonorgestrel tablets are emergency contraceptive pills, have a very good contraceptive effect, but can not do 100% contraception, so after taking levonorgestrel tablets amenorrhea, need to check the blood HCG, to understand whether there is a possibility of pregnancy. 2. Endocrine disorders: levonorgestrel tablets contain large doses of progesterone, which may affect their own estrogen and progesterone secretion, leading to menstrual disorders or even amenorrhea. Need to rule out pregnancy after further examination of sex hormone six, uterine accessories B ultrasound, according to the results of the examination under the guidance of a professional physician observation or drug treatment. Oral levonorgestrel tablets after amenorrhea should be taken seriously, as soon as possible as soon as possible to the hospital, a clear diagnosis, timely treatment.