Correct Answer: B

Rationale: A perineal pad saturated in 15 minutes is a sign of excessive postpartum bleeding, which requires immediate medical attention to prevent postpartum hemorrhage. The other findings are normal postpartum occurrences.

Correct Answer: A

Rationale: Ampicillin is the recommended antibiotic for treating group B streptococcus infections in pregnant women during labor to prevent neonatal infection.

Correct Answer: B

Rationale: The most common side effect of an epidural is hypotension, which can compromise placental perfusion. Monitoring the client's blood pressure is the priority to ensure maternal and fetal well-being.

Correct Answer: A

Rationale: Cold stress in newborns can lead to increased oxygen consumption and energy expenditure as the body tries to maintain its temperature. This can result in hypoglycemia and metabolic acidosis if not addressed. The use of a radiant warmer helps maintain the infant's body temperature, reducing the risk of cold stress and its complications.

Correct Answer: B

Rationale: Progesterone causes relaxation of the smooth muscles in the body, including the cardiac sphincter. This allows stomach acid to reflux into the esophagus, causing heartburn, especially during pregnancy.