<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, may I answer your health queries right now ? Please type your query here... 22years old my weight 47kg...my question is i started my petogen-fresenius injection last week friday which il get again in september,im worried that i had sexual intercourse lastnyt, and a condom bursts,so is the injection already working,or iv got high chances of being pregnant  <response>: Hi there, I have understood your concern. I will suggest you the best possible treatment options. First do not panic. As you have mentioned that you have taken injectable contraceptive almost a week back, you need not worry about getting pregnant. As you might be aware that injectable contraceptives start working within 3 to 5 days after getting the shot. Its action to prevent egg formation and prevent the pregnancy is already started Im your body, so please do not worry. I hope this answer helps you. Thanks. 