Which of the following best describes the mechanism of action of birth control pills?

Correct Answer: B

Rationale: Birth control pills primarily work by preventing ovulation, thereby inhibiting the release of eggs for fertilization. Choice A is incorrect because birth control pills do not directly block sperm; they prevent ovulation. Choice C is partially correct but is not the main mechanism, as the primary function is to prevent ovulation. Choice D is incorrect because birth control pills do not alter the size of reproductive organs.

Correct Answer: C

Rationale: A fetal heart rate of 100 bpm indicates bradycardia, requiring immediate intervention to ensure fetal well-being.

Correct Answer: A

Rationale: Assisting the client into a squatting position can help relieve pain and discomfort during labor. Squatting can open up the pelvis, allowing the baby to descend and progress through the birth canal more effectively. This position can also help with gravity-assisted delivery, decreasing the pressure on the mother's back and helping to reduce labor pains. Encouraging various positions during labor can provide comfort and promote optimal positioning for delivery.

Correct Answer: D

Rationale: Sternal retractions in a newborn may indicate respiratory distress or difficulty breathing. It is important for the nurse to intervene and assess the newborn's respiratory status further as this finding could be a sign of underlying respiratory issues that require immediate attention. The nurse should monitor the newborn's oxygen saturation, respiratory rate, and any other signs of distress to ensure appropriate intervention is provided promptly.

Correct Answer: B

Rationale: Repositioning the client can alleviate umbilical cord compression, the most common cause of variable decelerations.