The Veterans Health Administration (VHA) is the component of the United States Department of Veterans Affairs (VA) led by the Under Secretary of Veterans Affairs for Health that implements the medical assistance program of the VA through the administration and operation of numerous VA Medical Centers (VAMC), Outpatient Clinics (OPC), Community Based ...
Pregnancy tests will catch less than 70% of pregnancies at 4 days before a period. A few things to understand about pregnancy tests. When they say you can test up to 5 days before a missed period, that means 4 days before your period is due. That number is based on an average luteal phase (the time between ovulation and the first day of your period) of 14 days. Which means those tests recommend testing no sooner than 10 days past ovulation.
These tests, available commercially, are very accurate for the most part when used at the right time. Home pregnancy tests (HPTs) are most accurate when used one week after a missed menstrual period. However, as mentioned previously, some women do not experience implantation until a later time. These women, a smaller percentage, are indeed pregnant, but their HPT may be negative. This can cause some confusion and worry.