Baby Lying Sideways (Transverse Lie)
Medically reviewed by Dr. Lisa Okafor, MD, FACOG · Board-Certified OB-GYN
Content reviewed against published ACOG, NIH, March of Dimes guidelines
Last reviewed:
Your health matters just as much as your baby's. If you are dealing with baby lying sideways (transverse lie), here is what you need to know.
The short answer
A transverse lie means the baby is lying sideways (horizontally) across the uterus rather than vertically. This is common earlier in pregnancy but occurs in less than 1% of pregnancies at term. If the baby remains transverse near your due date, your provider will discuss options including external cephalic version (ECV) or planned cesarean delivery, as vaginal birth is not possible in this position.
Key takeaways
- A transverse lie means the baby is lying sideways (horizontally) across the uterus rather than vertically. This is common earlier in pregnancy but occurs in less than 1% of pregnancies at term. If the baby remains transverse near your due date, your provider will discuss options including external cephalic version (ECV) or planned cesarean delivery, as vaginal birth is not possible in this position.
- Usually normal when: Transverse lie before 36 weeks is very common and usually self-corrects
- Call your doctor if: Water breaks with a transverse lie - go to the hospital immediately (high risk of cord prolapse)
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What Parents Should Know
According to ACOG, NIH, March of Dimes guidelines, a transverse lie means the baby is lying sideways (horizontally) across the uterus rather than vertically. This is common earlier in pregnancy but occurs in less than 1% of pregnancies at term. If the baby remains transverse near your due date, your provider will discuss options including external cephalic version (ECV) or planned cesarean delivery, as vaginal birth is not possible in this position. At Second trimester, babies frequently change position throughout the second trimester, and a transverse lie at this stage is not a concern. There is still plenty of time and room for the baby to settle into a head-down position. It is generally considered normal when transverse lie before 36 weeks is very common and usually self-corrects. However, you should contact your pediatrician promptly if water breaks with a transverse lie - go to the hospital immediately (high risk of cord prolapse).
Normal vs. Concerning
By Age
What to expect by age
Second trimester
Babies frequently change position throughout the second trimester, and a transverse lie at this stage is not a concern. There is still plenty of time and room for the baby to settle into a head-down position.
Third trimester
If the baby is transverse after 36 weeks, your provider will evaluate the situation. Factors like placenta position, uterine shape, amniotic fluid volume, and multiple pregnancies can contribute. ECV may be attempted to rotate the baby. If the baby cannot be turned, a cesarean delivery will be planned, typically at 39 weeks.
What to Tell Your Pediatrician
- Describe when you first noticed baby lying sideways (transverse lie) and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if baby appears to be transverse after 34-36 weeks.
- Mention if you have had a previous transverse lie and wonder if it will recur.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Transverse lie before 36 weeks is very common and usually self-corrects
- Feeling the baby move into different positions throughout the day
- Baby appears to be transverse after 34-36 weeks
- You have had a previous transverse lie and wonder if it will recur
- You want to discuss options for encouraging the baby to turn
- Water breaks with a transverse lie - go to the hospital immediately (high risk of cord prolapse)
- Contractions begin with a known transverse lie
- Sudden abdominal pain with a known transverse lie
What You Can Do at Home
- Keep track of when you notice baby lying sideways (transverse lie) — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that transverse lie before 36 weeks is very common and usually self-corrects — this is generally within the range of normal.
- At Second trimester, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Prioritize your own rest and nutrition. Accept help when offered, and do not hesitate to reach out to your healthcare provider.
- While monitoring at home, seek immediate care if water breaks with a transverse lie - go to the hospital immediately (high risk of cord prolapse).
Related Conditions
Baby in Breech Position
A breech presentation means the baby is positioned bottom-first or feet-first rather than head-down. About 3-4% of babies are breech at full term. Many babies turn head-down on their own before 36-37 weeks. If the baby remains breech, options include external cephalic version (ECV) to turn the baby or a planned cesarean delivery.
When Birth Does Not Go as Planned
It is very common for birth to unfold differently than planned. About 1 in 3 births in the US involve cesarean delivery, and many other births involve unplanned interventions. Feeling disappointed, sad, or even grieving the birth experience you envisioned is completely valid. What matters most is that you and your baby are safe, but your feelings about the experience also matter.
Related Resources
Frequently asked questions
Is baby lying sideways (transverse lie) normal?
When should I call the doctor about baby lying sideways (transverse lie)?
When is baby lying sideways (transverse lie) normal?
What causes baby lying sideways (transverse lie)?
What should I mention to my pediatrician about baby lying sideways (transverse lie)?
Is baby lying sideways (transverse lie) normal at Second trimester?
Is baby lying sideways (transverse lie) normal at Third trimester?
Should I go to the ER for baby lying sideways (transverse lie)?
Does baby lying sideways (transverse lie) go away on its own?
References
- [1]American College of Obstetricians and Gynecologists. Fetal Malpresentation. ACOG, 2020. ACOG
- [2]National Library of Medicine. Fetal Malpresentation. StatPearls, 2023. NIH
- [3]March of Dimes. Positions of the Baby in the Womb. March of Dimes, 2023. March of Dimes
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Baby Lying Sideways (Transverse Lie).
Things to mention
- Describe when you first noticed baby lying sideways (transverse lie) and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if baby appears to be transverse after 34-36 weeks.
- Mention if you have had a previous transverse lie and wonder if it will recur.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Baby appears to be transverse after 34-36 weeks
- You have had a previous transverse lie and wonder if it will recur
- You want to discuss options for encouraging the baby to turn
Urgent signs to report immediately
- Water breaks with a transverse lie - go to the hospital immediately (high risk of cord prolapse)
- Contractions begin with a known transverse lie
- Sudden abdominal pain with a known transverse lie
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of baby lying sideways (transverse lie) are normal. Talk to your pediatrician if water breaks with a transverse lie - go to the hospital immediately (high risk of cord prolapse).
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Baby in Breech Position
A breech presentation means the baby is positioned bottom-first or feet-first rather than head-down. About 3-4% of babies are breech at full term. Many babies turn head-down on their own before 36-37 weeks. If the baby remains breech, options include external cephalic version (ECV) to turn the baby or a planned cesarean delivery.
When Birth Does Not Go as Planned
It is very common for birth to unfold differently than planned. About 1 in 3 births in the US involve cesarean delivery, and many other births involve unplanned interventions. Feeling disappointed, sad, or even grieving the birth experience you envisioned is completely valid. What matters most is that you and your baby are safe, but your feelings about the experience also matter.
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