Hi kalpana, Thanks for using the HCM. I am happy to address your questions, Pregnancy strips checks the presence of ‘hcg (human chorionic gonadotropin)’ hormone in the urine. If this hormone is there in the urine then one is ‘definitely’ pregnant. All you are required to put three drops of your morning urine on the test strip. Wait for five minutes and check the color of the strip. If you find two pink colors on the strip then you are pregnant. And, if you find that there is only one pink color on the strip then you are not pregnant. The presence of HCG in the urine is guaranteed for a pregnant woman when urine is there in the bladder for at least 4 hours. Hence, it is advisable to use this strip with morning urine. If the strip gives negative result then one should repeat the test within one week to get surety about the status of pregnancy. Remember to check results on the strip within 5 to 10 minutes for accurate prediction and not after few hours. Will also recommend to show to your clinician in case of any concerns as there are many OC pills available. Hope I have answered your query. If you have any further questions I will be happy to help. Thanks