The nurse is teaching a newborn care class to parents who are about to give birth to their first babies. Which statement indicates that teaching was effective?

A) Fundus below the symphysis and not palpable:
The process of involution refers to the shrinking and returning of the uterus to its normal size and position after delivery. By postpartum day 14, the uterus should be largely involuted, with the fundus no longer palpable above the pubic symphysis. This is a normal finding, as the uterus typically shrinks to its pre-pregnancy size over this period. The fundus should be at or below the symphysis pubis and should not be palpable after about two weeks postpartum, indicating that the involution process is proceeding as expected.

B) Moderate, bright red lochia:
While bright red lochia (also known as lochia rubra) is common during the first few days postpartum, by postpartum day 14, lochia should have transitioned to a serosa (pinkish or brownish) or alba (white or yellowish) appearance. Bright red lochia on day 14 would suggest a possible issue, such as retained placental fragments or uterine atony, and would require further evaluation.

C) Breasts warm, firm and tender:
Breast tenderness and firmness can be normal in the early postpartum period, especially as milk comes in. However, by postpartum day 14, if the breasts remain tender and warm, this could indicate mastitis or engorgement that hasn't been resolved. While some tenderness may still occur, it should have decreased by this point. If tenderness persists, further assessment would be needed.

D) Laceration slightly red and puffy:
Postpartum lacerations or episiotomy sites should begin to heal within the first few days, but slight redness and swelling might still be present at two weeks. However, puffiness or continued redness after 14 days may indicate poor healing, infection, or other complications, which requires further evaluation and intervention. Normal healing should show a decrease in redness and swelling by this time.

A) Protect the fetal skin from amniotic fluid:
Vernix caseosa is a whitish, cheese-like substance that covers the skin of the fetus during the second and third trimesters of pregnancy. It plays an essential role in protecting the fetal skin from prolonged exposure to amniotic fluid, which can be irritating. Vernix also serves as a barrier that helps prevent water loss and protects against potential infections.

B) Promote normal peripheral nervous system development:
While the development of the peripheral nervous system is vital to fetal development, the presence of vernix caseosa is not directly related to promoting nervous system development. The vernix's primary function is to protect the skin, not influence neural development. Neural development occurs due to other factors, such as adequate nutrition and hormonal regulation during pregnancy.

C) Allow transport of oxygen and nutrients across the amnion:
Vernix caseosa does not play a role in transporting oxygen or nutrients across the amnion. Oxygen and nutrients are transferred to the fetus through the placenta and the umbilical cord. The amniotic sac, which contains amniotic fluid, provides a cushioning effect for the fetus, but the vernix itself does not participate in nutrient or oxygen exchange.

D) Regulate fetal temperature:
Vernix caseosa does not directly regulate fetal temperature. Fetal temperature regulation is mainly managed by the mother's body through thermoregulation and the umbilical blood flow. The vernix may provide some protection against temperature fluctuations after birth, but its primary function is to protect the skin, not to regulate temperature.