The nursing, intructor is explaining the cardinal movements of labor to the nursing students. The instructor explains that the initial descent of the fetus into the pelvis to zero station is which one of the cardinal movements of labor.

Findings that require follow-up:

Uterus boggy at 24 hr postpartum:

A boggy uterus indicates poor uterine contraction, which can lead to postpartum hemorrhage. Effective uterine contraction is crucial to prevent excessive bleeding after delivery, and this finding warrants immediate intervention, such as fundal massage or administering uterotonic medications.

Lochia rubra with foul odor:

Foul-smelling lochia is a sign of potential infection, often indicative of endometritis, which is an infection of the uterine lining. The presence of this odor requires prompt follow-up and possibly antibiotic treatment to prevent further complications.

Elevated temperature (38.3°C/100.9°F) at 24 hr postpartum:

A postpartum fever may indicate infection, such as endometritis or a urinary tract infection (UTI). This fever should be investigated further to determine the cause and appropriate treatment, as untreated infections can lead to serious complications.

Increased heart rate (105/min) at 24 hr postpartum:

Tachycardia in the postpartum period can be a sign of infection or early signs of hemodynamic instability, possibly due to blood loss or infection. Close monitoring is necessary, and the healthcare provider should be notified to evaluate the cause and initiate treatment if necessary.

A) Uterine contractions:
While uterine contractions cause significant pain and discomfort during labor, particularly in the first and early second stages, by the time the client reaches the second stage of labor, the cervix is fully dilated, and the main cause of pain and pressure is no longer from the contractions themselves. Instead, the pain and pressure described in the second stage are primarily due to the fetal head descending through the birth canal, applying pressure to the perineum.

B) The fetal head applying pressure:
The pain and pressure reported in the second stage of labor are primarily due to the fetal head descending into and through the birth canal, putting pressure on the cervix, vagina, perineum, and pelvic floor. This pressure is a major source of discomfort in the second stage, as the fetal head stretches the tissues of the perineum, which is essential for facilitating birth. The sensation of pressure on the pelvic floor is often described by clients during this stage.

C) Nerve stimulation:
Nerve stimulation occurs during labor as a result of uterine contractions and the fetal descent, which can cause radiating pain to the lower back, thighs, and pelvic region. However, the specific pain and pressure in the pelvis and perineum described by the client are more directly related to the fetal head applying pressure, rather than generalized nerve stimulation. Nerve stimulation may contribute to pain but is not the primary cause of the pelvic and perineal pressure at this stage.

D) Cervical dilation:
Cervical dilation occurs in the earlier stages of labor (latent and active phases), and while it contributes to pain during these stages, by the second stage, the cervix should be fully dilated (10 cm). The pain and pressure that the client is feeling in the second stage are less about cervical dilation and more about the descent of the fetal head through the birth canal and its pressure on the perineum and pelvic floor.