<s>[INST] Hello, my girlfriend took Norifam to prevent pregnancy. she s supposed to have it injected on the 1st day of her period but instead, she had it on the last day. I figured the reason for having it on the first day of her period is to make sure she s not pregnant. By then we never had contact from her first day to the last, so I was sure that she wasn t pregnant. I read that users usually have periods 2 weeks after the injection however she hasn t. I m just worried because it s been 3 weeks and she still haven t had that supposed menstruation after the injection. Could she be pregnant? Or is there even a possibility that she could be pregnant considering that she had Norifam? [/INST] Hello. Thanks for writing to us. The chances of pregnancy are almost nil. It is not necessary to have periods two weeks after Norifam. The absence of periods is not suggestive of pregnancy.I hope this information has been both informative and helpful for you. Regards, Dr. Rakhi Tayal ,drrakhitayal@gmail.com </s>