If you have a regular menstrual cycle and get your period about every 28 days, you will probably miss your first period around 15 to 17 DPO if you're pregnant. For most women, missing their period is the first big symptom of pregnancy.
Home pregnancy tests work by detecting the levels of a hormone called human chorionic gonadotropin (hCG) in your urine. As your pregnancy progresses, the levels of hCG in your urine will rise. That's why some women might get a negative test result even if they are pregnant (a "false-negative"). A false-negative can occur if you take the test too early before the level of hCG is high enough to show clear results.
It's not likely that you'll experience many pregnancy symptoms at 15 DPO. The beginning of your pregnancy will be counted from the first day of your last period. If you have a regular cycle, that means that you'll be 4 weeks pregnant by the time you miss your period.
There is, however, a big symptom of pregnancy that you might have already experienced by 15 DPO: implantation bleeding. Although not every woman experiences implantation bleeding, if it does occur, it's one of the earliest and most important signs of pregnancy. Implantation bleeding happens when a fertilized egg travels down to your uterus and burrows into your uterine lining. This process is called implantation, and it can cause some mild bleeding.
Implantation bleeding usually happens 10 to 14 days after ovulation. You might experience very light spotting or mild bleeding that can resemble a light period. Some women only see a pink tinge on toilet paper. It can be difficult to differentiate implantation bleeding from menstruation; however, implantation bleeding occurs around days 22 to 25 of your menstrual cycle.
If you experienced some light bleeding before 15 DPO, it may have been the first sign of your pregnancy. But not every woman experiences this symptom. In some cases, the bleeding is so light that women don't notice it. Not experiencing implantation bleeding doesn't necessarily mean that you didn't conceive this month.
Although rare, some women do experience very early pregnancy symptoms at 15 DPO. Some of the most common early pregnancy signs include:
Keep in mind that in many cases, women won't experience strong pregnancy symptoms until they're a bit further along. So if you're at 15 DPO and don't feel anything unusual, there's nothing to worry about. It's perfectly normal to not notice any pregnancy symptoms at the start of the first trimester. As your pregnancy progresses, your hormone levels will rise and you'll start to experience all the traditional pregnancy symptoms!
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If you're trying to conceive and missed the first day of your period, you may be tempted to take a pregnancy test immediately. It can be very disappointing to get a negative pregnancy test result at 15 DPO. And if you still don't get your period after a negative pregnancy test result, you might feel confused and frustrated. After all, getting pregnant can be difficult.
But a negative pregnancy test result at 15 DPO doesn't always mean that you're not expecting a baby. It might mean that your hCG levels were still too low when you took that first pregnancy test. If your period doesn't come during the next few days, take a new pregnancy test. If you're pregnant, it's very likely that your hCG will have risen enough by then to be detected by the test.
It's also possible that your ovulation was delayed, which could result in a late period. Additionally, research shows that up to 10 precent of fertilized eggs haven't implanted into the uterine lining by the first day of a missed period.
If days go by without having a period and you're still getting negative pregnancy tests, go to the doctor. In very rare cases, pregnant women get negative results from home pregnancy tests and need to have a blood pregnancy test. However, it's more likely that stress or other factors have delayed your period. In any case, your doctor will be able to confirm whether or not you're pregnant and answer any questions.
It's also possible to get a positive pregnancy test result at 15 DPO, only to have your period start in the next few days. If this happens to you, you should call your doctor. Bleeding after a positive pregnancy test could mean that you're having a very early miscarriage.
A lot of women who are trying to conceive would love to see a big fat positive pregnancy test result by 15 DPO. But in some cases, your results will be more subtle, and you'll only be able to see a faint line.
A faint positive can mean that you're indeed pregnant, but your hCG levels are still too low to show up clearly on the test. In other cases, a faint line can be an evaporation line.
Evaporation lines show up on home pregnancy tests when you let them rest for longer than advised by the manufacturer before you check the results. If you see a faint line within the timeframe established by the test's manufacturer, it's very likely that you're pregnant. But if you let the test sit for too long, a faint line may be an evaporation line.
In other cases, a faint line can be caused by an early pregnancy loss. After a miscarriage, your hCG levels may still be elevated. If you see a faint line on your pregnancy test, but you've experienced symptoms such as bleeding and cramping, you might have experienced a very early miscarriage.
15 DPO usually marks the first day of your missed period. When you're trying to conceive, missing your period can be an exciting moment. But even if you don't get a positive pregnancy test yet, it doesn't mean that you haven't conceived. Waiting a few more days could be all you need to get that big fat positive test result!