One month after the scraping of the uterus without menstruation can have sex, but pay attention to sexual hygiene, but also to give contraception, because at this time there may be endocrine disorders caused by menstruation did not come. In case your period is delayed for half a month, it will be just in time for ovulation, so you have to take good contraceptive measures, and the best way is to use condoms to prevent pregnancy during sex. If you observe a week has not come to menstruation, for this case to actively give examination, can do ultrasound to understand the thickness of the endometrium, if the endometrium has been significantly thickened, to reach more than one centimeter can be given again to observe for three days still do not come to menstruation and then give the appropriate treatment, you can take oral progesterone to promote menstruation. If the lining of the uterus is relatively thin, only about seven millimeters, it is highly suspected that the endometrial damage caused by the scraping operation has caused adhesions in the uterine cavity, which leads to the lack of menstruation, so it is necessary to actively give treatment.