What symptom is uterine contraction

Pregnant women, there will be uterine contractions phenomenon, uterine contractions can be divided into false uterine contractions and true uterine contractions, false uterine contractions will appear tight phenomenon, but there is no rule, each time the duration is shorter. True uterine contractions will appear after term, abdominal pain gradually obvious, and pain has a rule, some women will accompany amniotic fluid rupture phenomenon appears.