The medication used within 30 days from the first day of the last menstrual period basically has an all or nothing effect on the fetus, which means that the child is going to be aborted or not, and the one that stays is fine. A similar conclusion was reached for X-rays done early in pregnancy, “I’m pregnant, but I didn’t know I was pregnant before I just took a cold pill, can I have this baby?” “I have hyperthyroidism and now I’m pregnant, do I need to stop the medication?” These questions are frequently asked by obstetricians and gynecologists and are a frequent concern for new mothers. Let’s first understand the “all or nothing” benefit, which refers to the effect of drugs on the embryo within 2 weeks from the time of fertilization, which either leads to the miscarriage of the child or nothing at all, and there is nothing wrong with the child. Fertilization usually occurs in the middle of menstruation, if the menstruation is once every 28 days, then the all or nothing benefit is within a month of menstruation, if the drug is taken without knowing the pregnancy, there is no need to be too nervous, if the child survives, then generally there is no problem.