If you’re trying to get pregnant, you might be eagerly monitoring everything going on with your body—every cramp, every twinge, every slight deviation from the norm. And if you're obsessively checking your underwear for signs of blood, know that you’re not alone. It’s stressful and exciting and totally overwhelming. Of course, it can be unnerving to see a streak of blood on your panties or after wiping, but don’t panic and assume you’re not pregnant if you notice a little spotting. Light, brief bleeding that lasts just a day or two can actually be a sign of early pregnancy. It’s known as implantation bleeding, and it can be a tip-off that an egg has successfully nestled into your womb. Suffice to say, you probably have a lot of questions—and we’re here to help. Want to learn how to recognize implantation bleeding, when it occurs, what it looks like and how you can tell the difference between this kind of bleeding and menstruation? Read on to get the full lowdown on implantation bleeding and what it may (or may not) mean, straight from the experts.

In this article:
What is implantation bleeding?
How common is implantation bleeding
When does implantation bleeding occur?
What does implantation bleeding look like?
Implantation bleeding vs. period: How to tell the difference
Implantation bleeding symptoms
When to call the doctor

What Is Implantation Bleeding?

Implantation bleeding is a small amount of spotting or bleeding that happens after a newly fertilized egg burrows into the lining of your uterus. Since the uterine lining is rich with blood, some women spot a little at this point. This is totally normal and no cause for concern, but a pregnancy test and doctor’s visit may be in order to make sure implantation bleeding is truly the culprit (and not something else, like your period).

How Common is Implantation Bleeding?

According to the American Pregnancy Association, approximately one third of women experience implantation bleeding in early pregnancy. All in all, there’s no real way to know whether spotting (or lack thereof) indicates pregnancy—only a test can tell. “Bleeding in the first trimester is common, although I would never say ‘normal,’” says Michael Cackovic, MD, a maternal fetal medicine physician at the Ohio State University Wexner Medical Center in Columbus. According to him, about 25 to 30 percent of women will experience some bleeding—including implantation bleeding—in the first trimester.

If you have no implantation bleeding, that’s perfectly normal too. “Don’t worry! It has no bearing on the success of your pregnancy,” says Julie Lamppa, APRN, CNM, a certified nurse midwife at Mayo Clinic.

When Does Implantation Bleeding Occur?

If you’re checking your underwear every few hours in hopeful anticipation, you may be wondering: How soon after conception would you notice spotting? And when exactly does implantation bleeding occur? “Implantation bleeding may occur right around the time you think you may be getting your period,” Lamppa explains—which is why it can be confusing for those who experience it. “Some women will notice a small amount of spotting or bleeding about 10 to 14 days after fertilization of the egg,” she adds.

If you suspect you’re experiencing implantation bleeding, you’re likely eager to take a home pregnancy test—and stat. Not so fast, though. While there’s no harm in taking a test at this point, you’re better off waiting a few more days for the most accurate results.

According to the Cleveland Clinic, your body starts producing human chorionic gonadotropin (hCG) about 10 days after conception, which is around the same time implantation bleeding may occur. At this early stage in a healthy pregnancy, hCG levels double every two days. Still, it takes time for the hormone to build up in your system and reach a volume that can be detected by an over-the-counter urine test. Some tests may be able to detect hCG about 10 days after conception, but waiting until after a missed period can lower the chance of a false negative. Blood tests are more sensitive to hCG and can detect the hormone 9 to 12 days after conception.

How long does implantation bleeding last?

It depends on the person, but some claim it lasts for one day, while others say three or four. Implantation bleeding can seem like a period, but it doesn’t last as long. Moreover, “you don’t continue to bleed like a normal period,” Lamppa says. So how much do you bleed during implantation? “It’s typically a small amount of spotting or bleeding,” adds Laurie MacLeod, APRN, CNM, a certified nurse midwife at ProMedica in Oregon, Ohio.

What Does Implantation Bleeding Look Like?

Now that you understand what it is and when it occurs, you might be left wondering: What does implantation bleeding look like? The truth is, implantation bleeding can resemble a lighter version of your period; it’s not enough to warrant a feminine pad, but you might consider wearing a pantyliner just in case. Unfortunately, this can make it tricky to differentiate between implantation bleeding vs. your period.

Implantation Bleeding Vs. Period: How to Tell the Difference

How can you tell if it’s implantation bleeding or your period? Depending on how you typically experience menstruation, this could be a bit of a waiting game. But there are some ways to distinguish between the two:

Duration: Your period will typically last longer than implantation bleeding, Macleod says. If you bleed for a day or two, it’s more likely to be implantation bleeding. If it stretches beyond that time frame, you may have gotten your period.
Volume: Implantation bleeding is generally lighter than a menstrual cycle and shouldn’t fill a pad. “If you experience bleeding that’s considered to be heavy spotting or bleeding, that would be more than implantation bleeding,” Lamppa says. (But if you tend to have light periods anyway, you might not notice a huge difference.)
Color: The color of implantation bleeding is also usually lighter than a normal period. It’s usually pink or slightly red at the start, MacLeod says, although it can be brownish as the bleeding resolves.
Texture: The texture of implantation bleeding can vary, but it shouldn’t be overly thick. “It shouldn’t contain clots,” Lamppa says. Clots typically form with heavy bleeding, so if you’re truly experiencing implantation bleeding, you shouldn’t have them.

Ultimately, if you’re still not sure about whether you’re experiencing implantation bleeding or your regular period, the best course of action is to wait a few more days and take a pregnancy test.

Implantation Bleeding Symptoms

Everyone will experience implantation bleeding symptoms differently. Some may have no additional markers besides the light bleeding, while others may start to encounter a few early signs of pregnancy, MacLeod says. According to her, these can include:

But again, don’t worry if you don’t experience these things. “You may not have any associated pregnancy symptoms at this time because it’s still so early,” Lamppa says.

When to Call the Doctor

There are a lot of things that can cause bleeding during the first few weeks and months of pregnancy. “Causes of bleeding during early pregnancy can range from irritation to the cervix and vagina as blood flow is increased to the area, to threatened miscarriage or even ectopic pregnancy,” Cackovic says. If you experienced bleeding and you’ve gotten a positive pregnancy test, it’s important to see your doctor sooner rather than later to determine what’s going on.

“Your provider will assess how far you are into the pregnancy, the amount of bleeding you’re experiencing, if you’re feeling pain and other possible risk factors,” Lamppa says. “All of this information will help your provider figure out the next best steps for your care.”

When you’re actively trying to get pregnant, it’s natural to scrutinize the inner workings of your reproductive system and even compare your symptoms to those of others. But remember, you may have implantation bleeding (or you may not), and your experience may be different than someone else’s. The tricky part is determining if the spotting is actually the result of implantation or something else entirely (like your period). If you’re anxiously awaiting an answer, take a deep breath, monitor for additional bleeding and consider taking a test in a few days. Of course, never hesitate to reach out to your doctor with any concerns.

Plus, more from The Bump:

What to Know About Ovulation Pain When You're Trying to Conceive

Calculating Your Fertile Window: When Are You Most Fertile?

Common Fertility Mistakes When Trying to Conceive

Pregnancy Signs