Weakness of labor

Weakness of labor. It is characterized by a lack of strength and duration of contractions of the myometrium, an increase in pauses between contractions. Distinguish primary and secondary patrimonial weakness. Primary weakness occurs at the beginning of the birth act and can continue both in the 2nd and 3rd stages of labor. Secondary weakness develops against a background of normal contractions in the 1 st or 2 nd stage of labor. Causes of primary weakness of labor: overstrain of the function of the central nervous system, endocrinopathy, preceding the menstrual cycle, infantilism, metabolic disorders, malformations of the uterus, inflammatory processes in the genitals, uterine overgrowth (polyhydramnios, multiple fetuses, large fetus), elderly primipara, The development of the primary weakness of labor is facilitated by the prenatal discharge of amniotic fluid. The causes of secondary generic weakness, in addition to those mentioned above, are: exhaustion of the parturient child in labor, a clinically narrow pelvis, transverse position of the fetus, pelvic predisposition, rigidity of the cervix, unsystematic administration of preparations stimulating labor.

Symptoms, course. The weakness of labor is expressed in the shortening of fights (or attempts) and the increase in pauses between them. This leads to a protracted course of labor, fetal hypoxia, the development of an ascending infection (chorioamnionitis), bleeding in the postpartum and early postpartum periods and an increase in the incidence of postpartum diseases. The diagnosis is based on the dynamic observation of the nature of the labor activity - weak, short fights, long pauses between them, delayed opening of the cervix (determined with vaginal examination), slow progressive advancement of the fetus's present part. Of the additional research methods used cardiotocography, external hysterography.