The short explanation
A low-lying placenta at the mid-pregnancy scan is common. It means the placenta is close to or covering the opening of the womb at this stage. In most women the placenta moves upward as the womb grows, so by the later scan it is no longer low. That is why a repeat scan is usually planned in the third trimester instead of deciding anything now. If the placenta is still low later in pregnancy, the condition is called placenta praevia. It can cause bleeding and may mean a planned caesarean is safer. Your doctor will explain the plan if that happens.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Previous caesarean births, womb surgery, twins and smoking make a low placenta more likely to persist.
- Bleeding from a low placenta is usually painless, which can make it easy to dismiss. Any bleeding in later pregnancy needs prompt assessment.
- Some doctors advise avoiding sex or heavy exertion while the placenta is low; ask what applies to you.
- If you live far from a hospital, ask about a plan for getting there quickly if you bleed.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you whether your placenta will move up or what birth plan you will need. Only the repeat scan and your doctor's advice can show that.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- How close is the placenta to the opening, and when is the repeat scan?
- Are there any activities I should avoid until then?
- What should I do if I have any bleeding?
- If it stays low, how will delivery be planned?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 or go to the nearest emergency department immediately if you have any vaginal bleeding, even painless, or if you have bleeding with pain or feel faint.
Get help the same day
- Get care the same day for any spotting in the second half of pregnancy.
Raise it at a routine appointment
- Attend the repeat scan in the third trimester as planned.
Sources
The evidence this explanation is built on.
- Prenatal care MedlinePlus (NIH)
- Pregnancy MedlinePlus (NIH)
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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