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Physiology of Labor

Which of the following patients are in labor?

a. A 23-year-old G1P0 at 38 weeks’ gestation with painful contractions and a cervix that remains closed over 2 hours

b. A 33-year-old G2P1 at 38 weeks’ gestation with nonpainful contractions and a cervix that changes to 3 cm dilated over 2 hours

c. A 33-year-old G2P1 at 38 weeks’ gestation with one prior cesarean delivery with painful contractions and a cervix that remains closed over 2 hours

d. A 33-year-old G2P1 at 38 weeks’ gestation with one prior cesarean delivery with painful contractions and a cervix that remains 1 cm dilated over 2 hours

Which of the following describes current theories of labor?

a. Synthesis of factors that induce parturition

b. Fetal source for commencement of parturition

c. Functional loss of pregnancy maintenance factors

d. All of the above

All except which of the following may result from abnormal parturition?

a. Dystocia

b. Preterm labor

c. Postterm pregnancy

d. Premature rupture of membranes

Which of the following qualities of smooth muscles is advantageous for contractions and fetal delivery?

a. Greater shortening with contractions

b. Forces are not exerted in multiple directions

c. Smooth muscle is organized in the same manner as striated muscle

d. Unidirectional force generation in the fundus and lower uterine segment

Which of the following is not a function of the cervix during pregnancy?

a. Preventing infection

b. Maintenance of competence

c. Extracellular changes for greater compliance

d. All of the above

Which of the following is a characteristic of the amnion?

a....

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