30 Questions
What is the longest phase of a contraction?
Increment
How is the intensity of uterine contractions during acme measured?
By palpating the contraction
What aids in the expulsion of the fetus and the placenta?
Maternal abdominal musculature contraction
Which characteristic usually describes contractions at the beginning of labor?
Mild, infrequent, and short in duration
What factor increases as labor progresses?
Duration and intensity of contractions
How is the intensity of uterine contractions during acme often estimated?
By palpating the contraction
What is the purpose of retraction during labor?
To assist in the progressive expulsion of the fetus
What is the physiological retraction ring?
The division of the uterus into upper and lower segments
What characterizes the upper uterine segment during labor?
It is formed from the body of the fundus and is muscular
How does the lower uterine segment change during labor?
It expands, thins out, and accommodates the fetus
What causes the lower uterine segment to stretch during labor?
Force applied by the descending presenting part and contraction of lower fibers
What happens to the physiological ring as labor progresses?
It gradually rises as the upper segment contracts and retracts
What is the main physiological process that forces the fetus toward the outlet during birth?
Uterine contractions
What influences the length of labor in the first stage according to the text?
Position of the fetus
During labor, what pattern does the uterine contraction follow in terms of fundal dominance?
Contraction starts in the fundus and spreads across and downwards
What is the term used to describe the neuromuscular harmony between two poles or segments of the uterus throughout labor?
Polarity
How does the upper pole of the uterus act during a uterine contraction?
Contracts strongly and retracts
What happens if polarity is disorganized during labor according to the text?
Progress of labor is inhibited
What is the significance of Bandl's ring in labor?
It indicates fetal distress
How does effacement of the cervix occur?
From the internal Os downwards
What happens during cervical dilation?
The cervical canal widens for passage of the fetus
When does effacement typically occur in pregnancy?
Late in pregnancy or during labor
What happens to the external Os during cervical effacement?
It remains unchanged while the internal Os widens
How do nulliparous and parous women differ in terms of cervical effacement and dilation?
The cervix of nulliparous women will not dilate until effacement is complete
What is one of the theories discussed in the text about the cause of the onset of labor?
Progesterone Withdrawal Hypothesis
Why is uterine relaxation between contractions considered important?
To allow for proper blood flow to the fetus
How is effacement defined in relation to the cervix?
Shortening and thinning of the cervix
What is dilatation defined as during labor?
Widening of the external os of the cervix
What is the significance of the mucus plug in pregnancy?
Protection against infections
What is the Progesterone Withdrawal Hypothesis in relation to labor?
Indicates that progesterone withdrawal triggers labor onset
Learn about the combined involuntary pressure of uterine contractions and voluntary muscle contractions during the first stage of labor, influencing factors, and active phase duration. Explore how various maternal and fetal factors can impact the length of labor.
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