Hi, Deviry contains medroxyprogesterone acetate as an active ingredient. It is a synthetic form of the female hormone progesterone. They are used to treat menstrual disorders, such as irregular periods, absence of periods, or abnormal uterine bleeding. In your wife s case, the delay in her period may be due to the use of the contraceptive pill, which can disrupt the normal hormonal balance in the body. However, if she has already taken a pregnancy test and it came back negative, it is less likely that she is pregnant. Deviry tablets are not used to avoid pregnancy, but rather to regulate the menstrual cycle. They work by mimicking the natural hormone progesterone and helping to maintain the lining of the uterus, which then breaks down and causes a period when the tablets are stopped. Your doctor may have prescribed Deviry to help induce a period, especially if there is a significant delay after taking the contraceptive pill. It is important to follow your doctor s instructions carefully when taking Deviry and to report any side effects or concerns to your doctor. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician