Can Plan B cause false negative pregnancy test?

Can Plan B cause false negative pregnancy test?

Though pregnancy tests are highly accurate, there’s still room for error. A few issues can affect your results, but your birth control pill isn’t one of them. The hormones in your birth control pill don’t affect a test’s ability to detect hCG.

What happens if you take Plan B and don’t get your period?

If your period is more than a week late, or you haven’t had a period within three weeks of taking Plan B®, it is possible that you’re pregnant. Talk to your doctor and have a pregnancy test done. Good to know: Tell your doctor if you have taken Plan B® within three days of a Pap test, as it may affect your results.

How long can Plan B delay your period for?

Using the morning-after pill may delay your period by up to one week. If you don’t get your period within three to four weeks of taking the morning-after pill, take a pregnancy test. Normally, you don’t need to contact your health care provider after using the morning-after pill.

Can Plan B throw off your next period?

Official Answer. Yes, Plan B (levonorgestrel) can delay your period or cause bleeding to occur outside of regular menstrual bleeding because levonorgestrel is a synthetic hormone. To prevent pregnancy, Plan B, like other birth control pills, must alter your hormone levels, which can prompt these menstrual changes.

Can Plan B mess up your period for 2 months?

Taking Plan B could affect the timing of your next period or cause other menstrual irregularities like bleeding between periods, and heavier or lighter menstrual flow. However, plan B’s effects on your period shouldn’t persist beyond one menstrual cycle.

Can Plan B mess up your cycle for 2 months?

Taking Plan B (also called emergency contraception, or the morning-after pill) can temporarily change someone’s menstrual cycle, so your girlfriend’s period will probably be different for at least a month. There’s nothing harmful or dangerous about using the morning-after pill as often as needed.

When should I take a pregnancy test after taking Plan B?

You can take these morning-after pills up to five days after unprotected sex, but they work much better if you take them during the first three days. Take a pregnancy test if you haven’t gotten your period within three weeks after taking the morning-after pill.

What causes a false negative on a pregnancy test?

You can get a negative result on your pregnancy test for two reasons: You are not pregnant or you are pregnant, but you tested too early for the pregnancy test you used to pick up the hCG ‘pregnancy’ hormone in your body.

Can Plan B Make your second period late?

The morning-after pill can cause your next period to be: A few days to a week early. A few days to a week late. Heavier than normal.

How late can your period be without being pregnant?

If you don’t have any known condition affecting your menstrual cycle, your period should start within 21 to 35 days of your last period, depending on your normal cycle. Regular periods can vary. If your regular cycle is 28 days and you still have not had your period on day 29, your period is officially considered late.