Home pregnancy tests are a convenient and private way to confirm pregnancy, but they aren’t always foolproof. A false negative result—when the test says you’re not pregnant, but you actually are—can happen. Let’s explore the reasons why and how to ensure accurate results. Common Factors Affecting Accuracy 1. Testing Too Early Pregnancy tests work by detecting human chorionic gonadotropin (hCG) , a hormone your body produces after a fertilized egg implants in the uterus. Implantation typically happens 6–12 days after ovulation. If you test too soon, your hCG levels may not be high enough for the test to detect. Tip: Wait until at least a week after your missed period for the most reliable results. 2. Diluted Urine Drinking a lot of water or other fluids before testing can dilute your urine, reducing the concentration of hCG. This is especially important in early pregnancy when hCG levels are still rising. Tip: Use your first-morning urine , as it’s more concentrated and likely t...