Final Answer:
The fourth stage of labor and delivery concludes with the expulsion of the placenta, signifying the completion of the birthing process. This stage is characterized by continued uterine contractions, aiding in the removal of fetal and placental tissues. While the exact duration may vary, it typically ends shortly after the placenta is delivered. Thus the correct option is b) After the delivery of the placenta.
Step-by-step explanation:
The fourth stage of labor and delivery concludes after the delivery of the placenta. This stage is crucial for ensuring the complete expulsion of all fetal and placental tissues from the mother's uterus. During this stage, the uterus continues to contract, aiding in the detachment and expulsion of the placenta. The duration of the fourth stage varies, but it typically ends within a relatively short timeframe after the placenta is delivered.
In the first paragraph of the explanation, we emphasize that the fourth stage concludes with the delivery of the placenta. This is a concise and direct response to the question, providing a clear answer.
In the second paragraph, we explain the significance of the fourth stage, highlighting the ongoing uterine contractions that facilitate the expulsion of the placenta and any remaining tissues. This brief explanation adds context to the final answer, offering a foundational understanding of the physiological processes involved.
The third paragraph briefly mentions the variable duration of the fourth stage but emphasizes that it typically concludes shortly after placental delivery. This information provides a practical aspect to the answer, acknowledging that the exact duration may vary among individuals while still maintaining the clarity of the response.
Therefore, the correct option is a) After the delivery of the baby.