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Uterine contraction. 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.
Braxton Hicks contractions. Other names. Practice contractions, false labor. Specialty. Obstetrics. 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.
The uterus or womb is the major female reproductive organ. The uterus provides mechanical protection, nutritional support, and waste removal for the developing embryo (weeks 1 to 8) and fetus (from week 9 until the delivery). In addition, contractions in the muscular wall of the uterus are important in pushing out the fetus at the time of birth.
Montevideo units are a method of measuring uterine performance during labor. They were created in 1949 by two physicians, Roberto Caldeyro-Barcia and Hermogenes Alvarez, from Montevideo, Uruguay. They are exactly equal to 1 mmHg within 10 minutes. A standard adequate measurement is 200; this is generally equivalent to 27 kPa of combined ...
Fergusson reflex. The Ferguson reflex (also called the fetal ejection reflex) is the neuroendocrine reflex comprising the self-sustaining cycle of uterine contractions initiated by pressure at the cervix, more precisely, the internal end of cervix, or vaginal walls. It is an example of positive feedback in biology.
Labor is characterized by uterine contractions which push the fetus through the birth canal and results in delivery. [14] Labor is divided into three stages. First stage of labor starts with the onset of contractions and finishes when the cervix is fully dilated at 10 cm. [15] This stage can further be divided into latent and active labor. The ...
Uterine muscle contractions are induced via a G-protein pathway stemming from the oxytocin receptor (OXTR), the binding and activation site of oxytocin. [7] When oxytocin binds to its associated receptors in the uterus, a cascade is initiated that results in an increase in calcium and subsequently an increase in muscle contractions. The release ...
Obstructed labour, also known as labour dystocia, is the baby not exiting the pelvis because it is physically blocked during childbirth although the uterus contracts normally. [ 2 ] Complications for the baby include not getting enough oxygen which may result in death. [ 1 ] It increases the risk of the mother getting an infection, having ...