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What is implantation bleeding?
Implantation bleeding explained: when it happens, what it looks like, how to tell it from your period and when bleeding in early pregnancy needs care.
Updated
In short
What is implantation bleeding?
Implantation bleeding is light spotting that can happen when a fertilized egg attaches to the lining of your uterus. It usually shows up 1 to 2 weeks after fertilization, around the time your period is due. It's usually pink, red or brown and much lighter than a period. Not everyone has it, and a pregnancy test is the way to know if you're pregnant.
Written by the Gyne team · Medical review: pending
Key takeaways
- Implantation bleeding is light spotting around the time your period is due.
- It's much lighter than a period and doesn't build into a heavy flow.
- Many people never have it, so no spotting doesn't mean you're not pregnant.
- Test from the first day of your missed period, and test again if it's negative.
- If you're pregnant, tell your doctor about any bleeding.
When does implantation bleeding happen?
Implantation bleeding can happen 1 to 2 weeks after fertilization, when the fertilized egg attaches to the lining of your uterus. For many people, that's close to the day their period is due.
This timing is why it's easy to mistake for the start of a period.
What does implantation bleeding look like?
It's usually spotting or only a little blood, like a very light period. You might see spots of pink, red or brown blood on your underwear or on toilet paper.
Bleeding that soaks a pad, or has clots, is not spotting. It needs to be checked, especially if you might be pregnant.
Implantation bleeding vs period: how can you tell?
It can be hard to tell them apart, but a few clues help:
- Amount: implantation bleeding is spotting or a little blood, while a period usually gets heavier for the first few days.
- Color: implantation bleeding is often pink or brown, while a period is usually red once it gets going.
- Length: a period usually lasts 2 to 7 days with a steady flow, while implantation spotting stays light.
- Other signs: sore breasts, tiredness and needing to pee more can come with early pregnancy, but they also happen before a period.
Does spotting mean I'm pregnant?
Not always. Light bleeding can have other causes, like irritation of the cervix after sex or a pelvic exam, an infection, or a period that starts light.
Bleeding from an ectopic pregnancy, where the pregnancy grows outside the uterus, can also be mistaken for a period. It often starts and stops and can be watery and dark brown. That's why bleeding with pain needs prompt care.
If you're not sure what's causing spotting, note when it starts, how much there is and its color. That helps your doctor if you need to call.
What other early signs of pregnancy can come with it?
Early pregnancy signs usually start around 4 to 6 weeks of pregnancy, counted from the first day of your last period. Not everyone has them, and many also happen before a period. Signs you may notice include:
- A missed period.
- Feeling or being sick, at any time of day or night.
- Feeling very tired after your usual activities.
- Sore, larger or tender breasts.
- Needing to pee more often, without pain.
- A metallic taste, or being more sensitive to smells.
When should I take a pregnancy test after implantation bleeding?
Wait until the first day of your missed period. Your body makes the pregnancy hormone hCG only after implantation, and the level needs a few days to rise enough for a home test.
If the test is negative but your period still doesn't come, test again a few days later. Your first morning urine gives the best chance of an early result.
Is bleeding in early pregnancy normal?
Bleeding in the first trimester is common. It happens in about 15 to 25 in 100 pregnancies, and in many cases it doesn't signal a major problem.
But bleeding can also be a sign of infection, an early pregnancy loss or an ectopic pregnancy. Contact your doctor about any bleeding while you're pregnant.
When to see a doctor
- You have a positive pregnancy test and any vaginal bleeding.
- You might be pregnant and have pain low on one side of your belly, even with a negative test.
- You have pain at the tip of your shoulder, which can be a sign of internal bleeding: get care right away.
- You're bleeding with severe belly pain, feel faint or dizzy, or soak a pad soon after putting it on: call 911 or your local emergency number.
- You have bleeding with a fever of 100.4°F (38°C) or higher, or pain when you pee.
- You often spot between periods or after sex.
How Gyne helps
Gyne keeps your ovulation and pregnancy tests in one place, with results over time. When your temperature rises after a positive ovulation test, it moves your period prediction to 12 to 14 days later, so you can see when a pregnancy test makes sense.
Trying to conceive and IVFThis guide is general information, not medical advice. Only a doctor can diagnose a condition.