I and my wife are planning to have a child two years after. But my wife missed her periods for the first time, She should menstruate around 25th of May. So she took three doses of susten 300 on 28th, 29th and 30th. But I made sure that my semen did not enter her vagina , using a condom, during her fertile days. Im worried now. Will susten 300 bring her period? If no, what would we do to avoid conception? Please explain.