 [ Symptoms ] i have not been taking my birth control at the exact same time everyday i just had unprotected sex can i get pregnant  i am on minastrin 24 fe i have taken them every day just not always at the same exact time i am supposed to take at 830 but sometimes i will take it between 1000 and 1100 [ Disease ] inr stands for international normalized ratio the inr provides some information about a person is blood is tendency to clot which is often described as how “thin” or “thick” their blood is the inr comes from the conversion of another value the prothrombin time pt prothrombin time is the time it takes for blood to clot in a test tube a high or low pt can suggest bleeding or clotting tendencies most often the pt is checked to monitor a person is response to blood thinners such as warfarin coumadin the problem with prothrombin time testing is that several manufacturers produce and sell slightly different pt tests to laboratories the same person is blood might have different results if tested on two different companies pt tests to solve this problem the international normalized ratio inr was created by entering a pt result into a math formula it yields the inr the international normalized ratio means one lab is test results can be compared to another is with high accuracy a normal inr is approximately 1 0 people taking the blood thinner warfarin typically have a target inr of 2 0 to 3 0 people with an inr higher than the normal range who are not taking warfarin may have a medical condition that needs further evaluation a low inr is rarely significant