21 days of contraceptives missed eating a day to take 16 days with the room will be pregnant

21 days need to take contraceptives are generally short-acting contraceptives, if missed as long as within 12 hours as soon as possible will not affect the contraceptive effect. So 21 days of contraceptives missed a day to take 16 days missed as long as timely supplement generally will not be pregnant, but if multiple leaks, also did not make up, you can accidentally pregnant.