C53 Anti-Pregnancy Tablets is an alias for Bifidone Lactate Tablets, which is a family visit contraceptive in clinical practice and is used for contraception in couples visiting their families for a short period of time. However, due to its side effects, it has been used less frequently in clinical practice and is contraindicated in women with liver or kidney disorders, as well as in women who are breastfeeding. Diethylstilbestrol tablets can inhibit the secretion of hypothalamic luteinizing hormone and block the release of gonadotropins, resulting in ovulation inhibition, thus achieving the purpose of contraception. However, women may experience menstrual cycle disorders, prolonged menstrual cycle, or irregular vaginal bleeding, or even amenorrhea after using diethylstilbestrol tablets. Also, some gastrointestinal reactions, such as nausea, vomiting, anorexia and abdominal distension, may occur during the oral administration of Bifidone carbamate tablets. In addition, there will be headache, dizziness, weakness, drowsiness and other symptoms. It is recommended that people with contraceptive needs should try to choose the right contraceptive pill under the guidance of a professional doctor, taking the pill blindly on their own, so as not to cause adverse reactions or even lead to the end of contraceptive failure.