91Ó°ÊÓ

Which best describes the three stages of labor? a. During stage one, the cervix thins. During stage two, the cervix is dilated to about 10 cm and the baby is expelled from the uterus. The last stage is the passage of the placenta after the baby has been born. b. During stage one, the cervix thins and is dilated to about 10 cm. During stage two, the baby is expelled from the uterus. The last stage is the passage of the placenta after the baby has been born. c. During stage one, the cervix thins. During stage two, the cervix is dilated to about 10 cm. During the last stage, the baby is expelled from the uterus, followed by the placenta. d. During stage one, the cervix thins and may or may not be dilated. During stage two, the baby is expelled from the uterus. The last stage is the passage of the placenta after the baby has been born.

Step by step solution

01

Identify the three stages of labor

There are three primary stages in the process of labor and childbirth: 1) Thinning (effacement) and dilation of the cervix, 2) Expulsion of the baby, and 3) Passage of the placenta.

02

Analyze each option

Compare each option with the identified stages. We are looking for the correct sequence where the first stage involves cervical effacement and dilation, the second involves expulsion of the baby, and the third involves the passage of the placenta.

03

Evaluate Option (a)

Option (a) specifies: 1) Cervix thinning, 2) Cervix dilated to about 10 cm and baby expulsion, 3) Passage of the placenta. This is incorrect because the second stage should only involve baby expulsion, not cervical dilation.

04

Evaluate Option (b)

Option (b) specifies: 1) Cervix thinning and dilation to about 10 cm, 2) Baby expulsion, 3) Passage of the placenta. This sequence correctly matches the stages of labor.

05

Evaluate Option (c)

Option (c) specifies: 1) Cervix thinning, 2) Cervix dilated to about 10 cm, 3) Baby expulsion followed by placenta. The third stage incorrectly includes baby expulsion instead of the passage of placenta alone.

06

Evaluate Option (d)

Option (d) specifies: 1) Cervix thinning with possible dilation, 2) Baby expulsion, 3) Passage of the placenta. This sequence is mostly correct but lacks specificity in the first stage, making option (b) more accurate.

07

Choose the best option

Option (b) is the best match as it correctly describes all three stages: thinning and dilation of the cervix, expulsion of the baby, and passage of the placenta.

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Key Concepts

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

cervical effacement

Cervical effacement is the first step in the labor process. It refers to the thinning of the cervix in preparation for childbirth. The cervix, which is usually thick and long, becomes shorter and softer, making it easier for the baby to move through the birth canal. Effacement is usually measured in percentages, with 0% meaning no thinning and 100% meaning completely thinned. This stage is essential because it indicates that the body is getting ready for the baby to be born.

cervical dilation

Cervical dilation is the opening of the cervix, measured in centimeters from 0 to 10. During labor, the cervix dilates to allow the baby to pass from the uterus into the birth canal. Initially, the dilation is slow but it accelerates as labor progresses. Full dilation at 10 cm allows the baby to be pushed out during the next stage of labor. While cervical effacement focuses on thinning, dilation is all about opening.

baby expulsion

Baby expulsion, or the second stage of labor, is when the baby is pushed out of the uterus through the birth canal. This stage begins once the cervix is fully dilated to 10 cm. The mother will feel strong contractions that help move the baby down. This can be a brief stage or it can take several hours. Moms often describe a strong urge to push, akin to intense bowel movements. Healthcare providers guide pushing to avoid any complications.

placenta passage

The final stage of labor is the passage of the placenta, also known as the afterbirth. After the baby is born, contractions continue to help expel the placenta from the uterus. This usually occurs within a few minutes after birth, but it can take up to 30 minutes. Healthcare providers ensure that the entire placenta is expelled to prevent postpartum complications like infection or hemorrhage. The passage of the placenta signals the completion of the birthing process.