How much is the contraction pressure considered a true contraction

Under normal circumstances, uterine contraction pressure must reach at least 60 mm Hg above is effective uterine contraction, that is, true uterine contraction. When fetal heart monitoring, can detect uterine contraction pressure is generally around 20 mm Hg, at this time pregnant women no abdominal pain, no sense of defecation, this uterine contraction pressure belongs to invalid uterine contraction, that is, false uterine contraction. False uterine contractions are more than the current third trimester, pregnant women after activities, or after fetal movement may show false uterine contractions, more accompanied by abdominal hardness, tightness, belongs to the normal phenomenon, pay more attention to rest. If pregnant women show abdominal hardness, tightness, accompanied by paroxysmal abdominal pain, this is mostly effective uterine contractions, effective uterine contractions are necessary conditions to promote uterine dilation.