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These labour contractions are characterized by their rhythmic tightening and relaxation of the myometrium, the most prominent uterine muscle. Labour contractions primarily serve the purpose of opening and dilating the cervix , [ 7 ] which leads to the assisting of the passage of the baby through the vaginal canal during the first stage of labour.
This reduced relaxation period between contractions also results in an inability to clear acidotic metabolites from the cells which may lead to fetal acidosis. [1] Fetal pulse oximetry gave researchers the means to quantify the effects that result from uterine tachysystole. [1] In 2008, 1,493 contractions were studied across 30 patients.
The postpartum period can be divided into three distinct stages; the initial or acute phase, six to 12 hours after childbirth; subacute postpartum period, which lasts two to six weeks, and the delayed postpartum period, which can last up to six months. In the subacute postpartum period, 87% to 94% of women report at least one health problem.
The area of action differs for each effect, contraction occurs in the upper uterine segment while relaxation occurs in the lower uterine segment. [14] Not as efficacious for inducing labor when compared to other prostaglandins. [16] Dinoprost: also known as PGF 2α, is a naturally occurring prostaglandin which causes contraction via PG F ...
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 latent phase is defined by cervical dilation of 0 to 6 cm. The active phase is defined by cervical dilation of 6 cm to 10 cm.
In a typical infectious disease, the incubation period signifies the period taken by the multiplying organism to reach a threshold necessary to produce symptoms in the host. While latent or latency period may be synonymous, a distinction is sometimes made whereby the latent period is defined as the time from infection to infectiousness. Which ...
Failure to progress can take place during two different phases; the latent phase and active phase of labor. [1] The latent phase of labor can be emotionally tiring and cause fatigue, but it typically does not result in further problems. [1] The active phase of labor, on the other hand, if prolonged, can result in long term complications. [1]
Montevideo units can be more simply calculated by summing the individual contraction intensities in a ten-minute period, a process which should arrive at a result identical to the original method of calculation. [2] Generally, above 200 MVUs is considered necessary for adequate labor during the active phase.