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Changes in posture
Pregnancy

Changes in posture

2 min readWeek 20
Key takeaways
2 min
  • Expect your center of gravity to shift as your abdomen rounds out, causing shoulders to rest back and pelvis to protrude forward.
  • Wear properly fitted maternity bras with flat seams and wide straps to support heavier breasts and reduce back strain.
  • Choose natural fiber underwear like soft cotton to accommodate your changing body shape comfortably.
  • Use pregnancy pillows earlier if expecting twins, as increased fetal movement can disrupt sleep patterns.
  • Seek immediate medical attention for any red discharge, especially if diagnosed with placenta previa or low placentation.

During pregnancy, your growing abdomen shifts your center of gravity, causing shoulders to rest back while stomach and pelvis protrude forward. This postural change increases spinal load, often resulting in back pain that worsens with weight gain.

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Changes in posture

In your current week of pregnancy, your abdomen will start rounding out and your waist will practically disappears, the skin of the anterior abdominal wall is stretched, and the umbilical fossa is smoothed. Pigmentation of the midline of the abdomen is noticeably enhanced. Sometimes fine hair begins to grow from the pubic joint up to the navel — don’t worry, that unwanted hair will fall out after childbirth [1].

The changes to the shape and position of your abdomen will cause a shift in your center of gravity, which in turn can change your posture. The shoulders of expectant mothers might rest back further than normal, while the stomach and pelvis start to protrude. This posture creates an increased load on the spine, which can produce pulling pains in the back. Pain can become stronger if there is a significant increase in weight.

The mammary glands become heavier, which means you will likely have to wear a larger-sized bra. When choosing underwear, try to choose items made from natural fibers such as soft cotton. The seams should be flat and away from the nipple, wide straps will help support the chest wall.

If you are expecting twins

Active movements of the babies, especially at night, can interfere with your sleep. So you might want to consider getting special pregnancy pillows earlier than other moms.

Discharge

If you have been diagnosed with placenta previa or low placentation, then the pressure of the growing baby on the placenta at the front of the uterus can cause bleeding. Even with minimal red discharge, you should seek medical attention immediately.

Tests and examinations

The time is coming for a planned second-trimester ultrasound, during which you may be able to know the baby’s sex.


  1. Brewer S. The Pregnant Body Book. Dorling Kindersley Publishing Staff, 2012, pp. 134, 135.

Frequently asked questions

Your growing abdomen shifts your center of gravity, causing postural changes that increase load on your spine. This creates pulling pains in the back, which worsen with significant weight gain.

Posture changes typically begin when your abdomen starts rounding out and your waist disappears. This usually occurs during the second trimester as your baby grows.

Choose bras made from natural fibers like soft cotton with flat seams away from nipples. Wide straps are essential to properly support heavier mammary glands.

Yes, fine hair growing from the pubic joint to the navel is completely normal during pregnancy. This unwanted hair will fall out naturally after childbirth.

Medical Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or qualified health provider with any questions you may have regarding a medical condition.

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Medically reviewed content

Reviewed by healthcare professionals · Updated August 13, 2025

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