Hello and welcome to HCM. I am Dr Madhuri a Consultant Obstetrician and Gynecologist and will be helping you with your queries. If you have used the pills as per instructions, that is started the new pack within seven days after the last active yasmin pill and used microlite regularly, then the absent periods do not need an investigation now. Just wait for a few more cycles and see how the periods span out. If you still have absent periods then you may need evaluation. If the pills have been started later than 7 days after the last active pill of yasmin or if any pills have been missed then pregnancy is possible. So in that case a urine test is justified to rule out pregnancy. So kindly check about your status and then you will be able to decide about the course of action. If the pills have been taken properly, absent periods must not be a cause of concern as the pills are very low dose and the dose may sometimes be so low for some women that it does not induce bleeding. So do not worry. Hope this satisfies your query. Thanks for using HCM. Feel free to ask any more questions that you may have. Dr Madhuri Bagde Consultant Obstetrician and Gynecologist