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Braxton Hicks contractions, also known as practice contractions or false labor, are sporadic uterine contractions that may start around six weeks into a pregnancy. [1] However, they are usually felt in the second or third trimester of pregnancy .
Uterine contractions are muscle contractions of the uterine smooth muscle that can occur at various intensities in both the non-pregnant and pregnant uterine state. The non-pregnant uterus undergoes small, spontaneous contractions in addition to stronger, coordinated contractions during the menstrual cycle and orgasm.
A contraction stress test (CST) is performed near the end of pregnancy (34 weeks' gestation) to determine how well the fetus will cope with the contractions of childbirth.The aim is to induce contractions and monitor the fetus to check for heart rate abnormalities using a cardiotocograph.
Contractions gradually become stronger and closer together. [15] Since the pain of childbirth correlates with contractions, the pain becomes more frequent and strong as the labour progresses. The second stage ends when the infant is fully expelled. The third stage is the delivery of the placenta. [16]
Frequency: the number of contractions per unit time. Duration: the amount of time from the start of a contraction to the end of the same contraction. Resting tone: a measure of how relaxed the uterus is between contractions. With external monitoring, this necessitates the use of palpation to determine relative strength.
Uterine Tachysystole is a condition of excessively frequent uterine contractions during pregnancy. [1] It is most often seen in induced or augmented labor, though it can also occur during spontaneous labor, [2] and this may result in fetal hypoxia and acidosis.
subtract the resting tone from the peak intensity of the contraction; add the 3 contractions together to get the MVUs; Montevideo units are calculated by obtaining the peak uterine pressure amplitude and subtracting the resting tone. Then adding up those numbers generated by each contraction within a 10-minute window.
The term is used to describe a cluster of physical changes that may take place in a pregnant woman before she goes into "real" labor, such as an increase in blood volume (sometimes resulting in edema), Braxton Hicks contractions, the presence of colostrum in the breasts, and the dislodging of the mucus plug that has sealed the cervix during the ...