Yes, Dydrohope SR-20 Tablet can delay your period even if you are not pregnant. It contains dydrogesterone, a hormone similar to natural progesterone. This hormone helps regulate your cycle and prepare the uterus for a possible pregnancy. While you are taking it, the hormone levels stay high, and this can hold off your period. Your period usually starts a few days after you stop taking the tablets (usually within 3–7 days). If your period is very late or you are unsure, it is always a good idea to take a pregnancy test or check with your doctor just to be sure.