Questions and Answers
What is the definition of labor?
The process by which regular uterine contractions lead to progressive effacement and dilation of the cervix
What is the lie in vertex presentation?
99.5% longitudinal and 0.5% others
What is the attitude denominator in vertex presentation?
Occiput
What is the range of the station system?
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What are uterine contractions considered to be?
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Study Notes
Labor and Fetal Presentation
- Definition of Labor: The process by which the uterus contracts to move the fetus down the birth canal.
Vertex Presentation
- Lie in Vertex Presentation: The fetus's longitudinal axis is in line with the mother's longitudinal axis.
- Attitude Denominator in Vertex Presentation: The fetus's spine is flexed, with the chin tucked to the chest.
Station System
- Range of the Station System: A system measuring the progress of the fetus's head during labor, ranging from -3 to +3, with -3 being the highest point and +3 being the lowest point in the birth canal.
Uterine Contractions
- Uterine Contractions: Periodic, involuntary contractions of the uterus that help move the fetus down the birth canal during labor, considered a natural process to facilitate childbirth.
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