You should ideally wait at least 4 to 7 days after implantation bleeding before taking a home pregnancy test to improve accuracy. Testing too soon, such as 1 day after implantation bleeding, can lead to false negatives because hCG levels may not be high enough yet to be detected by urine tests

. Blood tests can detect pregnancy earlier, about 3 to 4 days after implantation, as they are more sensitive to lower hCG levels, but these are usually done in clinical settings

. Implantation bleeding typically occurs 6 to 12 days after ovulation, around a week before your next period is due. Since hCG doubles approximately every 48 to 72 hours, waiting until after your missed period or at least a week post-implantation bleeding gives more reliable test results

. To maximize accuracy when testing at home:

• Use the first morning urine, which is more concentrated.
• Follow the test instructions carefully.
• If negative but pregnancy is still suspected, wait 3 days and test again

In summary, for the most reliable pregnancy test results, wait about a week after implantation bleeding or until after your missed period before testing. Testing earlier may not detect pregnancy due to insufficient hCG levels. Blood tests can detect pregnancy slightly earlier but are less commonly used for routine testing