Here are eight possible reasons for a missed period and a negative pregnancy test. Amenorrhea (the scientific term for lack of menstruation) can happen for many reasons, and you may need to see a healthcare provider to get things back on track. If the second or third test is negative, it’s time to look at other potential causes of your missed period. It’s best to take a pregnancy test first thing in the morning, before your urine has been diluted with fluids from food and water. Wait several days, and if you still don’t get your period, take the test again. Since your ovulation date could be slightly different each month, it may take a week or two after conception to get a reliable pregnancy test result. Your body needs to have a high enough level of the hormone human chorionic gonadotropin (HCG) for the test to detect.Įarly in pregnancy, HCG levels double every few days. Different brands of tests have different guidelines about timing.Įven if the test you bought claims to be accurate on the first day of a missed period, you’re better off waiting at least one more day. Home pregnancy tests aren’t always perfectly accurate - especially if you take them too soon after your missed period. Depending on when you took the test, you could get a false negative result.