Passing clots in the first days after birth is common, and seeing one can still be frightening. Here’s what normal clots look like, how big is too big, why they happen, and the separate kind of blood clot, in the legs or lungs, that every new mother should know about.
Blood clots after birth are common in the first few days. They form when blood from the uterus pools, often overnight or while you’re sitting or lying down, and then comes out when you stand up. Most clots are small, about the size of a grape or smaller, and they get fewer and smaller as your bleeding, called lochia, gets lighter. Clots should mostly stop within the first week or two. Clots larger than an egg, bleeding that soaks a pad in an hour, or clots with fever, dizziness or a foul smell need medical care right away. A different kind of clot, in a leg vein or the lungs, is also more likely after birth and is an emergency.
What’s normal, and what isn’t
| Usually normal | Get medical help |
|---|---|
| Clots the size of a grape or smaller | Clots larger than an egg |
| A few clots in the first days, often after resting | Many clots, or clots that keep coming after the first week |
| Clots that get smaller as bleeding lightens | Clots with bleeding that soaks a pad in an hour |
| Dark red, jelly-like clots | Grayish tissue, a foul smell, fever or worsening belly pain |
Why clots happen after birth
- Pooling: when you lie or sit for a while, blood collects in the vagina and uterus and clots, then comes out as you stand.
- The healing placenta site: the uterus sheds its lining and heals where the placenta was attached, which can release clots in the first days.
- Breastfeeding: feeding makes the uterus contract, which can push out pooled blood and clots.
- Doing too much: lifting, long walks or busy days can bring back heavier bleeding with clots; see Postpartum Bleeding Stopped and Started Again.
Large or ongoing clots can be a sign that the uterus isn’t contracting well, that a piece of placenta has stayed inside, or of infection. Those need treatment, so don’t wait them out.
How long do clots last after birth?
Most clots come in the first few days, while bleeding is heaviest. As lochia changes from red to pinkish-brown, usually around the end of the first week, clots should become rare. An occasional small clot after more activity can still happen, but large or frequent clots after the first week or two need a check. For the full timeline of bleeding, see Lochia: Stages, Colors and How Long It Lasts.
What helps
- Empty your bladder often. A full bladder can stop the uterus from contracting well.
- Rest and build up activity slowly. Heavier bleeding with clots is often a sign to slow down.
- Use pads, not tampons or cups, and change them often.
- Track what you see: number of pads, clot size and color, so you can describe it clearly if you call.
The other kind of blood clot: legs and lungs
Some people searching “blood clots after birth” are worried about a different problem. For several weeks after birth, especially after a C-section, the risk of a clot in a deep vein (deep vein thrombosis) or in the lungs (pulmonary embolism) is higher than usual. Get emergency care for:
- Pain, swelling, warmth or redness in one leg, especially the calf
- Sudden shortness of breath, chest pain that’s worse when you breathe in, or coughing up blood
- A racing heartbeat, or feeling faint
Moving around as soon as you’re able, drinking enough fluids and following any clot-prevention advice you were given in hospital all help lower the risk. Swelling in both feet and ankles is common after birth and usually harmless; see Postpartum Swelling for how to tell the difference.
When to get medical help
Call 911 or get emergency care for bleeding that soaks a pad in an hour or less for two hours in a row, clots larger than an egg, dizziness or fainting, or any of the leg or lung signs above.
Call your clinician the same day for a fever of 100.4°F (38°C) or higher, foul-smelling discharge, grayish tissue, worsening belly pain, or clots that keep coming after the first week. These signs can appear weeks after birth; see the CDC’s urgent maternal warning signs.
The traditional Chinese medicine view
In Traditional Chinese Medicine, dark clots after birth, especially with cramping that eases with warmth, are traditionally described as blood held back by cold and stagnation. Traditional postpartum care, known as “sitting the month,” focuses on warmth, rest and warm, cooked food to help the body clear and rebuild. These are traditional descriptions, not a diagnosis. Large or ongoing clots always need a medical check first.
Where Postpartum Recovery fits
The Postpartum Recovery herbal pouch is a sealed external pouch with nothing to swallow, for mothers exploring complementary care once their clinician has checked their bleeding. It isn’t a treatment for clots, heavy bleeding or any bleeding problem. Confirm the current placement instructions with us, and have your obstetric clinician approve the timing and site, never over a healing incision or tear. Breastfeeding safety studies haven’t been done, so review the ingredients with your clinician and keep pouches away from your baby.
Quick answers
Is it normal to pass blood clots after birth?
Yes, small clots are common in the first few days, especially after lying down or breastfeeding.
How big is too big for a clot after birth?
Clots larger than an egg need prompt medical care, as do clots with very heavy bleeding.
Why am I passing large blood clots weeks after birth?
It can follow too much activity, but it can also mean retained tissue or infection. Call your clinician.
When will my period clots be like normal again?
Once your periods return, some small clots on heavy days are common; see Blood Clots During Your Period.
Reviewed October 2026. Author: Qingcai Wang, MD, PhD, developer of the Five Essences external herbal-pouch formulations, with a commercial interest in their sale. General education only; continue your medical care.
Sources: ACOG, Postpartum care; NHS, Your post-pregnancy body; CDC, Urgent maternal warning signs.