Told you have an anterior placenta at your scan? Nothing is wrong. It's in 40–45% of pregnancies. Here's what it means for movement, Doppler, labour, and — importantly — what it doesn't affect at all.
Being told you have an anterior placenta at your 20-week scan — often with no further explanation — reliably causes anxiety. 'Is this a problem? Does it affect the baby? Why did this happen?'
The short answers: no, no, and it's random. The placenta attaches wherever the fertilised egg implants in the uterine wall. The front wall (anterior) and back wall (posterior) are both completely normal attachment sites. An anterior placenta occurs in around 40–45% of pregnancies. It is not a complication, not caused by anything you did, and does not affect how the placenta functions. Your baby receives identical nutrition and oxygen regardless of which wall the placenta is on.
The only things that genuinely differ with an anterior placenta are sensory: how and when you feel movement, and how easily a Doppler or scanner picks up the heartbeat. Everything else is the same as any other pregnancy.
The placenta sits between the baby and your abdominal wall. Movements that you would normally feel as distinct kicks or rolls are dampened by this cushion — like feeling a kick through a pillow.
Practically, this means:
• You may feel first movements later than usual — often around 20–24 weeks rather than 16–20 weeks
• Movements may feel softer or more fluttery than expected
• You may feel movements more clearly at the sides of the bump, or lower down, rather than centrally
• A Doppler may take more attempts to find the heartbeat in early pregnancy, particularly before 16 weeks
None of this means there is less movement — it means you're less able to feel it. Research confirms that with an anterior placenta, the perception of movement is reduced, not the movement itself.
One genuine implication of anterior placenta: it is slightly more likely to be associated with a back-to-back (occiput posterior) baby in labour. The mechanism is biomechanical — the weight distribution of the anterior placenta may subtly affect how the baby positions itself.
This is not inevitable: most babies with anterior placentas are born in the anterior position. But it is worth being aware of if you are preparing for labour. If your baby is noted to be in a posterior position in late pregnancy, the anterior placenta is relevant context. The WiseMama guide to back-to-back babies covers what this means for labour and what to do about it.
Apart from the OP connection, an anterior placenta does not typically affect labour, the birth itself, or the type of delivery. It does not increase the risk of placenta praevia. It does not affect the likelihood of needing a caesarean. It does not cause any known complications on its own.
If you know you will be having a caesarean (planned or via VBAC discussion), mention the anterior placenta to your surgical team. In a caesarean, the surgeon incises through the uterine wall, and knowing the placenta's position helps the team plan the precise location of the incision to minimise risk of cutting through placental tissue.
This is a routine consideration for surgical teams who perform caesareans — they will already have noted placental position from your scan records — but it's worth being aware of so you can raise it if it doesn't come up in your pre-operative discussion.
For the vast majority of women with anterior placentas, no surgical adjustment is needed. The note is primarily for those in whom the placenta is both anterior and also very low-lying, which is a separate assessment made at the 20-week scan and 32-week check.
A list of things that are the same with an anterior placenta as with any other:
• Your baby's growth and development
• The nutritional and oxygen supply the placenta provides
• The risk of stillbirth, miscarriage, or preterm birth
• Your ability to have a vaginal birth
• Your ability to breastfeed
• The baby's health at birth
An anterior placenta that is noted at the 20-week scan as 'anterior, high, not low-lying' is a normal anatomical variant requiring no additional monitoring or treatment. You will not be recalled for any additional scans because of it. If you have been told you have an anterior placenta and no other concerns were raised, you do not need to do anything differently.
The only practical takeaway: expect to feel movement a little later, and from unexpected angles. Once you have an established movement pattern, trust it as your baseline.