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  2. Uterine contraction - Wikipedia

    en.wikipedia.org/wiki/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.

  3. Childbirth - Wikipedia

    en.wikipedia.org/wiki/Childbirth

    The latent phase is generally defined as beginning at the point at which the woman perceives regular uterine contractions. [41] In contrast, Braxton Hicks contractions , which are contractions that may start around 26 weeks gestation and are sometimes called "false labour", are infrequent, irregular, and involve only mild cramping. [ 42 ]

  4. Vaginal delivery - Wikipedia

    en.wikipedia.org/wiki/Vaginal_delivery

    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 ...

  5. Cervical dilation - Wikipedia

    en.wikipedia.org/wiki/Cervical_dilation

    From that point, pressure from the presenting part (head in vertex births or bottom in breech births), along with uterine contractions, will dilate the cervix to 10 centimeters, which is "complete." Cervical dilation is accompanied by effacement, the thinning of the cervix. General guidelines for cervical dilation: Latent phase: 0–3 centimeters

  6. Prolonged labor - Wikipedia

    en.wikipedia.org/wiki/Prolonged_labor

    Issues with uterine contractions are the main cause of prolonged labor during the latent phase. Contractions may not occur as of a result of uterine tumors. In addition, if the uterus is stretched, usually due to previous pregnancies or multiple gestation, contractions may be difficult. Irregular or weak contractions can be fixed through ...

  7. Pre-labor - Wikipedia

    en.wikipedia.org/wiki/Pre-labor

    Pre-labor consists of the early signs before labor starts. It is the body's preparation for real labor. Prodromal labor has been misnamed as “false labor." Prodromal labor begins much as traditional labor but does not progress to the birth of the baby.

  8. Fergusson reflex - Wikipedia

    en.wikipedia.org/wiki/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. The Ferguson reflex occurs in mammals.

  9. Maternal physiological changes in pregnancy - Wikipedia

    en.wikipedia.org/wiki/Maternal_physiological...

    Uterine Compression of IVC and Pelvic Veins. Displacement of PMI by Uterus. Uterine enlargement beyond 20 weeks' size can compress the inferior vena cava, which can markedly decrease the return of blood into the heart or preload. As a result, healthy pregnancy patients in a supine position or prolonged standing can experience symptoms of ...