Can An Anterior Placenta Move? | What Experts Say

Yes, an anterior placenta can shift position as the uterus expands, typically resolving low-lying placements by the third trimester.

You hear the word anterior and picture something fixed — a signpost planted in place. So when your ultrasound tech mentions the placenta is on your front wall, you might assume that location is locked in for the rest of the pregnancy. It’s a reasonable guess, but it’s not quite how placental positioning works.

The short answer is yes — an anterior placenta can shift as your uterus expands. Many people who have a low-lying or front-wall placenta early on find it has moved to a different spot by the third trimester. This article covers what research shows about how and why placental position can change, and what it means for how you feel your baby move.

How An Anterior Placenta Shifts During Pregnancy

The placenta attaches to the uterine wall wherever the embryo implants, and that spot is usually determined early in the first trimester. As the uterus grows and stretches, the placenta can appear to migrate. It doesn’t actively crawl — the uterine wall expands unevenly, which changes the placenta’s relative position.

Cleveland Clinic notes that the majority of low-lying placentas detected in the second trimester will have a normal position by the third trimester. This “movement” is actually the placenta staying put while the uterus grows upward, pulling the placenta away from the cervix.

So when someone asks whether an anterior placenta can move during pregnancy, the honest answer is yes — though the shift is relative to the growing uterus rather than active migration. What changes is the placenta’s position in relation to the cervix and the abdominal wall.

Why The “Placenta Moving” Idea Feels Surprising

Most of your organs stay put — your liver doesn’t wander, and your kidneys remain anchored. So the idea that the placenta can shift sounds unusual at first. It’s natural to wonder whether the ultrasound tech made a mistake or if the position really does change on its own.

• Placental trophotropism. This is the term for how the placenta grows toward areas of better blood supply as the uterus expands, which can make it appear to move over time.
• Uterine expansion. The uterus grows from about the size of a pear to a full-term watermelon. That dramatic stretching changes where the placenta sits relative to the cervix.
• Ultrasound timing. A placenta seen as low-lying at 20 weeks often appears higher on a follow-up scan at 32 weeks simply because the uterus has grown upward.
• Not active migration. The placenta doesn’t crawl across the uterine wall. It’s the surrounding tissue that grows and shifts around it, giving the impression of movement.
• Variation by location. An anterior placenta behaves the same way as a posterior or fundal placenta when it comes to position changes — the attachment site doesn’t alter the mechanism.

Understanding this can help you feel less caught off guard if an early scan mentions a low-lying or anterior placenta. For most people, the position resolves on its own as the pregnancy progresses, and no special treatment is needed.

What An Anterior Placenta Means For Your Pregnancy

Having the placenta on the front wall of your uterus is generally not a cause for concern. It doesn’t increase your risk of complications, and it doesn’t affect your baby’s development. The main difference you might notice is how and when you feel fetal movement.

The placenta acts as a cushion between your baby and your belly — Cleveland Clinic’s anterior placenta definition explains this cushioning effect in detail. This padding can make kicks feel softer or more muffled, especially early in the second trimester when movements are still subtle.

The position of the placenta also influences when you might feel movement for the first time. With a posterior placenta, some people notice flutters as early as 17 to 19 weeks. An anterior placenta can push that first-noticeable kick to 22 weeks or later.

None of these variations are cause for alarm. Once your baby is big enough — typically after 28 weeks — the difference between positions becomes less noticeable because movements are stronger and easier to detect regardless of where the placenta sits.

How To Track Fetal Movement With An Anterior Placenta

Feeling your baby move is one of the most reassuring parts of pregnancy. With an anterior placenta, you might notice movement a bit differently, but you should still feel your baby regularly. Many experts suggest focusing on certain positions and patterns to track what’s normal for you.

1. Focus on your sides. Kicks Count UK suggests feeling for movement on your lower abdomen and sides rather than the center front, where the placenta creates the most cushioning.
2. Lie on your left side. Many people find movement more noticeable when lying quietly on their left side, especially after a meal when blood flow and activity can increase.
3. Track the pattern, not the count. Tommy’s notes there is no set number of kicks — every baby has their own rhythm, and consistency in that rhythm is the key sign of wellbeing.
4. Trust a drop in activity. If movement ever feels significantly less than usual, contact your midwife or provider. An anterior placenta shouldn’t cause a decrease in perceived movement over time.

An anterior placenta doesn’t reduce how much your baby moves — it can make some movements feel softer or more muffled. Learning your baby’s unique daily pattern, rather than aiming for a specific number of kicks, is the most reliable approach.

When A Low-Lying Anterior Placenta Resolves

One of the most common concerns about placental position is when the placenta sits low, near or covering the cervix — known as placenta previa or a low-lying placenta. Research suggests this often resolves on its own as the pregnancy progresses.

A study hosted by NIH tracked outcomes for low-positioned anterior placentas and found that the majority showed a normal position by the third trimester — see the low-lying placenta resolves analysis for the full data. The mechanism is the same: as the uterus expands upward, the placenta moves with the uterine wall away from the cervix.

For most people, a low-lying placenta detected at the 20-week scan will have moved higher by 32 weeks. Only a small percentage of cases remain low enough to require cesarean delivery or other interventions.

It’s important to note that while many low-lying placentas resolve, your provider will schedule follow-up scans to confirm. If you’re told you have a low-lying placenta early in pregnancy, there’s a good chance it will not be an issue later on.

The Bottom Line

An anterior placenta can shift as your uterus grows, which is why many low-lying placentas seen in the second trimester resolve by the third. The main practical effect for most people is that fetal kicks may feel softer or take longer to notice — but your baby’s movement patterns remain normal. If you’re unsure about your placental position, follow-up ultrasounds typically provide clarity.

Your midwife or obstetrician can review your specific ultrasound results and advise whether a follow-up scan is needed to check placental position later in pregnancy.