The difference between premature rupture of fetal membranes and leucorrhea is mainly the amount of secretion, character and pH, which can be judged according to the specific situation, and if the possibility of premature rupture of fetal membranes is higher, timely medical attention is needed to avoid endangering the health of the pregnant woman and the fetus. 1, amount of secretion: when the fetal membranes rupture prematurely, the secretion will suddenly increase and have continuity, the duration varies, the initial amount is more, after which it will gradually decrease or intermittent outflow, after lying down The flow is suddenly reduced, often accompanied by a small amount of red; while the amount of leucorrhea is small, dripping, intermittent discharge; 2, character: amniotic fluid is colorless, tasteless, thin, may be accompanied by a small amount of fetal fat; while the color of leucorrhea is milky white, more viscous; 3, pH: pH test paper can be used to detect, amniotic fluid pH is 7-7.5, greater than 7 to consider premature rupture of membranes, smear can be seen amniotic tooth-like crystals can also confirm the diagnosis, while the normal leucorrhea is The normal leucorrhea is acidic. In late pregnancy, it is important to note that no strenuous exercise, no sexual life is recommended, and symptoms similar to rupture of membranes should be diagnosed at the hospital in time to avoid the risk of preterm labor or intrauterine distress.