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Chapter 28: Problem 18

The first stage of labor is the stage. (a) dilation (b) expulsion (c) placental (d) decidual

Short Answer

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(a) dilation

Step by step solution

01

Understand the Stages of Labor

Labor is divided into three main stages: dilation, expulsion, and placental. In the context of childbirth, these stages mark the progression of labor.
02

Identify the First Stage

The first stage of labor is referred to as the dilation stage. This is when the cervix begins to dilate and efface, which is the process that prepares the body for birth.
03

Differentiate Between Other Stages

The second stage is the expulsion stage, where the baby is delivered. The third stage is the placental stage, where the placenta separates and exits the birth canal.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Dilation Stage
The dilation stage is the first of the three stages of labor. During this stage, the cervix, which is the entrance to the uterus from the vagina, begins to dilate, or open. This dilation is essential to allow the baby to pass through the birth canal during delivery.

This stage also involves effacement, where the cervix thins out to allow for a smoother delivery process. These changes happen in response to uterine contractions that occur more frequently and with increasing intensity. The dilation stage can last from several hours to many hours, depending on individual circumstances like whether this is a first or subsequent childbirth.

Key points about dilation:
  • Signified by the opening and thinning of the cervix.
  • Can be intensely painful due to contractions.
  • Marks the preparation phase for childbirth.
Expulsion Stage
The expulsion stage, also known as the second stage of labor, commences once the cervix is fully dilated. This is the phase where the baby makes its way through the birth canal and is delivered into the world.

During this stage, the mother will often feel an intense urge to push, as the baby's head moves down. This urge to push is aided by powerful uterine contractions and the mother's efforts. It's a critical and physically demanding part of labor but marks an exciting and joyous moment as the baby is born.

Key features of the expulsion stage:
  • The cervix is fully dilated (around 10 centimeters).
  • Delivery of the baby happens in this stage.
  • Stage ends once the baby is fully born.
Placental Stage
The placental stage is the third and final stage of labor. It occurs after the baby has been delivered. In this stage, the placenta, which has nourished the baby throughout pregnancy, detaches from the uterus and exits through the birth canal.

This process is often quicker than the previous stages, typically lasting around 15 to 30 minutes. During this stage, it is crucial for the healthcare provider to ensure that the whole placenta is delivered to prevent complications.

Important aspects of the placental stage include:
  • The placenta separates and is expelled.
  • Usually occurs 5 to 30 minutes post-delivery of the baby.
  • Completes the childbirth process.

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Most popular questions from this chapter

During the first trimester of development, (a) the fetal lungs begin to process air. (b) the beginnings of all the major organ systems begin to appear. (c) the organs and organ systems complete their development. (d) the fastest period of fetal growth occurs.

Match each numbered item with the most closely related lettered item. (a) begins with the onset of true labor (b) begins as the cervix dilates completely (c) birth (d) characterized by rapid fetal growth (e) incision through the perineal musculature (f) layer of follicular cells around the oocyte (g) enzyme in the acrosome (h) cytoplasm of the oocyte (i) time of embryonic/early fetal development (j) characterized by the continued development of organ systems hyaluronidase

Match each numbered item with the most closely related lettered item. (a) begins with the onset of true labor (b) begins as the cervix dilates completely (c) birth (d) characterized by rapid fetal growth (e) incision through the perineal musculature (f) layer of follicular cells around the oocyte (g) enzyme in the acrosome (h) cytoplasm of the oocyte (i) time of embryonic/early fetal development (j) characterized by the continued development of organ systems episiotomy

During the second trimester, the most significant event that permits the mother to realize that she is carrying a fetus within her body is that (a) the fetal brain begins to grow greatly. (b) the fetus begins to move inside the uterus. (c) eye and ear basic structures form. (d) articulations between joints appear.

The extra-embryonic membrane that forms the urinary bladder is the (a) yolk sac. (b) allantois. (c) amnion. (d) chorion.
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