Correct Answer: B

Rationale: Methylergonovine is used to prevent or treat postpartum hemorrhage by contracting the uterus. A firm fundus indicates effective uterine contraction and less bleeding. Therefore, the correct answer is a firm fundus to palpation. The increase in blood pressure (Choice A) is not a typical finding associated with the effectiveness of methylergonovine. Increase in lochia (Choice C) may indicate excessive bleeding rather than the medication's effectiveness. Absence of breast pain (Choice D) is not directly related to the medication's effectiveness in treating postpartum hemorrhage.

Correct Answer: D

Rationale: Encouraging the client to empty her bladder every 2 hours is essential during labor to prevent bladder distention, which can hinder labor progress and cause discomfort. A distended bladder can also lead to potential complications such as uterine atony or increased risk of infection. Choice A is incorrect as maintaining the client in the lithotomy position is not necessary during the active phase of the first stage of labor and may not be comfortable for the client. Choice B is incorrect because performing vaginal examinations frequently can increase the risk of introducing infection and disrupt the natural progress of labor. Choice C is incorrect as bearing down with each contraction is typically reserved for the second stage of labor when the cervix is fully dilated, not during the active phase of the first stage.

Correct Answer: D

Rationale: The correct sequence of maternal changes during pregnancy is as follows: Amenorrhea (absence of menstrual periods), Goodell's sign (softening of the cervix), Quickening (first fetal movements felt by the mother), and Lightening (baby descending into the pelvis). These changes occur at different stages of pregnancy and are important indicators of fetal development and maternal adaptation. Choice A is correct as it is the initial change indicating possible pregnancy. Choices B, C, and D follow in the correct order of occurrence during pregnancy. Choices B, C, and D are incorrect as they do not follow the correct sequence of maternal changes.

Correct Answer: A

Rationale: During the active phase of the first stage of labor, contractions lasting longer than 90 seconds can indicate uterine hyperstimulation, leading to decreased placental perfusion and fetal oxygenation. This finding should be reported to the provider for further evaluation and management. Choices B, C, and D are not the priority findings in this scenario. Contractions occurring every 3 to 5 minutes are within the normal range for the active phase of labor. Strong contractions and feeling contractions in the lower back are common experiences during labor and not necessarily concerning unless associated with other complications.

Correct Answer: B

Rationale: Methylergonovine is used to prevent or treat postpartum hemorrhage by contracting the uterus. A firm fundus indicates effective uterine contraction and less bleeding. Therefore, the correct answer is a firm fundus to palpation. The increase in blood pressure (Choice A) is not a typical finding associated with the effectiveness of methylergonovine. Increase in lochia (Choice C) may indicate excessive bleeding rather than the medication's effectiveness. Absence of breast pain (Choice D) is not directly related to the medication's effectiveness in treating postpartum hemorrhage.