Mild cramping about a week before your period can be an early sign of pregnancy. Here’s what it usually feels like, where you might feel it, and when cramps need attention.
Implantation cramps are mild cramps that some women feel when a fertilized egg attaches to the lining of the uterus, usually 6 to 12 days after ovulation. They typically feel like a dull ache, light pulling or prickling in the lower belly, milder than period cramps, and last from a few hours to a couple of days. Some women also notice light pink or brown spotting. Many pregnant women feel nothing at all, and implantation cramps can’t be reliably told apart from early period cramps, so a pregnancy test from the day your period is due is the only way to know. Severe or one-sided pain needs prompt medical care.
What implantation cramps feel like
- A dull, mild ache in the lower belly
- Light pulling, tugging or prickling sensations
- Brief twinges that come and go
- Usually milder than period cramps, and they don’t build in strength
Some women describe them as “period cramps, but lighter.”
Where do implantation cramps hurt?
- Low in the middle of the belly, most commonly
- Sometimes more on one side
- Occasionally in the lower back
Sharp, severe or worsening pain on one side isn’t typical of implantation. See the warning signs below.
How long do implantation cramps last?
Usually a few hours to one or two days. Cramps that continue for longer, or that get stronger, are more likely to be your period starting, or something else worth checking.
Later in early pregnancy, mild on-and-off cramping is also common as the uterus grows. That’s different from implantation cramps, and it’s usually normal too.
Implantation cramps or period cramps?
| Implantation cramps | Period cramps | |
|---|---|---|
| Timing | 6 to 12 days after ovulation, often a few days before your period | Just before or as your period starts |
| Strength | Mild, steady or come-and-go | Often stronger, building over hours |
| Length | Hours to 2 days | Usually 1 to 3 days, with bleeding |
| Bleeding | None, or light pink or brown spotting | A period that gets heavier |
The two can feel very similar, so these are clues, not proof. If your period doesn’t arrive, take a test.
Other causes of cramps before your period
- Your period approaching, the most common cause
- Ovulation pain, around the middle of your cycle. See how to know if you’re ovulating.
- Digestion, such as gas or constipation
- An ovarian cyst or infection
See our guide to cramps but no period for more.
Easing mild cramps if you could be pregnant
- Rest, and take a short, gentle walk
- A warm (not hot) compress on your lower belly. Avoid very hot baths and hot tubs if you might be pregnant.
- Drink enough water
- Ask before taking pain relievers. Ibuprofen and similar medicines are usually avoided in pregnancy. Acetaminophen is generally preferred, but check with your doctor or pharmacist.
When to get help
Get urgent care for:
- severe pain, or pain mostly on one side
- pain in the tip of your shoulder
- heavy bleeding
- dizziness or fainting
These can signal a pregnancy outside the womb (ectopic pregnancy), which needs emergency care.
Contact your doctor or midwife if you have cramps with a positive pregnancy test and any bleeding, or cramps that keep getting worse.
If you’re trying to conceive
Our guides to implantation bleeding and how long it takes to get pregnant can help while you wait.
If you’ve been using Fertility Nourish, stop once pregnancy is possible or confirmed.
Reviewed October 2026. Author: Qingcai Wang, MD, PhD, founder of Five Essences. General education only; continue your medical care.
Sources: ACOG: bleeding during pregnancy; Cleveland Clinic, implantation cramps.