<prompt> Minimum effective dose of oestrogen in OCPs is20 mcg30 mcg40 mcg50 mcg  <response>: Combined oral pillsCombined oral pills contain a mixture of ethinyloestradiol EE2 in a dose of 20 to 30 μg and an orally active progestogen which is a 19-norsteroid. Mala-D contains 0.5 mg of d-norgestrel and Mala-N contains 1 mg norethisterone; these are available free of cost in India. The tablets are taken starting on the second day of the cycle for 21 days. A new course of tablets should be commenced 7 days after the cessation of the previous course. They should be taken at a fixed time of the day, preferably after a meal. 