Braxton Hicks contractions are irregular tightenings of the uterus. Although Braxton Hicks contractions happen from very early in pregnancy, most women do not really notice them until the second half of pregnancy. Braxton Hicks contractions are thought to play a part in toning the uterine muscle and promoting the flow of blood to the placenta. Some people call them 'practice contractions’.

Braxton Hicks contractions tend to be started off by either you or the baby moving, or by somebody touching your abdomen. Each ‘contraction’ may last 1-2 minutes. During this time, the whole uterus becomes hard. This may feel strange and rather uncomfortable – but should not be painful. Braxton Hicks contractions stay much the same throughout pregnancy (although you may notice them more); they do not get larger, harder or more frequent like ‘real’ contractions.