Implantation bleeding or period? How to tell
Implantation bleeding is lighter and shorter than a period: pink or brown spotting that lasts a few hours to two days, with no clots and little or no cramping. It happens about 10 to 14 days after ovulation, often just before your period is due. A period usually starts light, then gets heavier and redder, and lasts 2 to 7 days.
What implantation bleeding is
About 6 to 12 days after an egg is fertilized, the early embryo burrows into the lining of the uterus. That can disturb tiny blood vessels and cause a little spotting. It's harmless and it happens in roughly 1 in 4 pregnancies. Most pregnant people never notice it.
Side by side
| Implantation bleeding | Period | |
|---|---|---|
| Timing | About 10 to 14 days after ovulation, often a few days before your period is due | When your period is due |
| Color | Light pink or brown | Starts pink or brown, turns bright to dark red |
| Flow | Spotting; a liner is enough | Gets heavier, needs a pad, tampon or cup |
| Clots | None | Small clots are common on heavy days |
| How long | A few hours to about 2 days | 2 to 7 days |
| Cramps | None or very mild | Often stronger, especially days 1 to 2 |
| Pattern | Stays light, then stops | Builds up, then tapers off |
The most useful clue is what it does next. Implantation spotting stays light and stops. A period ramps up within a day.
When to take a pregnancy test
During implantation bleeding, hCG is usually still too low for a test to pick up, so testing straight away often gives a false negative. Wait until the day your period was due, or at least a few days after the spotting stops. Our implantation calculator estimates when implantation might happen, and the pregnancy test calculator gives the best day to test.
Other reasons for light bleeding before a period
- Spotting before your period, common as progesterone falls
- Ovulation spotting in the middle of your cycle
- Starting, missing or changing hormonal contraception
- Irritation of the cervix after sex
- Perimenopause, polyps or infections
Logging spotting as spotting (not as day 1) keeps your cycle predictions accurate, and shows whether light bleeding before your period is a regular pattern for you.
When to see a doctor
Get urgent care if bleeding in early pregnancy comes with severe or one-sided tummy pain, shoulder-tip pain, dizziness or fainting, or if it becomes heavy like a period with clots. See a doctor for bleeding after sex or between periods that keeps happening.
Frequently asked questions
What does implantation bleeding look like?
A few drops or streaks of light pink or brown blood, often only when you wipe. See what implantation bleeding looks like.
Can implantation bleeding be red?
It's usually pink or brown. Bright red, heavier bleeding with clots is more likely a period or something to check with a doctor.
Can you have implantation bleeding and a negative test?
Yes, because hCG may not be high enough yet. Test again on or after the day your period was due.
Does everyone get implantation bleeding?
No. Only about a quarter of pregnant people notice any, so no bleeding doesn't mean no pregnancy.
Sources
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Implantation calculator: when does implantation happen?Free implantation calculator: see the days implantation would most likely happen this cycle, what implantation bleeding looks like, and when to test.
PMS or pregnancy? How to tell the differencePMS vs pregnancy symptoms look almost the same: sore breasts, cramps, tiredness, mood swings. The few clues that differ, and when a test is reliable.What does implantation bleeding look like?What does implantation bleeding look like? Light pink or brown spotting, no clots, lasting hours to 2 days. How it differs from a period and when to test.
Spotting before your period: what's normal and why it happensSpotting before period starts is common. Why light pink or brown spotting shows up in the days before your period, what's normal, and the signs to check.When to take a pregnancy test: find your most accurate dayWhen to take a pregnancy test: enter your last period and cycle length to see the earliest testing day and the day a result is most reliable.