A postpartum client delivered by Cesarean section 1 day ago.

The mother's blood type is O negative and the newborn's blood type is B positive.

Which of the interventions should the nurse perform?

Choice A rationale

The first menstrual flow after childbirth is often heavier than normal, not lighter, and may be accompanied by more clotting. This is due to the thicker endometrial lining that has built up during the period of amenorrhea, and the subsequent heavier shedding of this tissue during the first cycle.

Choice B rationale

For non-breastfeeding mothers, menstruation can return as early as 4 to 6 weeks postpartum. For breastfeeding mothers, the return is highly variable and often delayed, but not strictly for 6 months. It depends on the frequency, duration, and exclusivity of breastfeeding, sometimes returning earlier.

Choice C rationale

Exclusive breastfeeding, meaning no supplementation with formula or solids, results in higher levels of prolactin which suppresses the ovarian response to follicle-stimulating hormone (FSH) and luteinizing hormone (LH), delaying ovulation. Supplementation decreases prolactin levels, often allowing ovulation to resume earlier.

Choice D rationale

Suckling stimulates the release of prolactin, which suppresses ovarian function by inhibiting the release of GnRH (Gonadotropin-releasing hormone), thereby blocking the release of FSH and LH. Consistent, frequent, and exclusive breastfeeding maintains high prolactin levels and therefore prolongs the period of lactational amenorrhea.

Choice A rationale

Convection involves the loss of heat due to air currents moving across the infant's skin. While some air movement is always present, the primary risk for heat loss associated with proximity to a large cold exterior wall and window in a winter environment is the transfer of heat to those large, unheated, non-contact surfaces through radiation, not typically a draft.

Choice B rationale

Radiation is the transfer of heat from a warm object (the infant) to a cooler solid object (the exterior wall and large window) that is not in direct contact with the body. These large, cold surfaces act as heat sinks, causing the infant to lose body heat significantly via electromagnetic waves, a major mechanism of heat loss in a crib placement next to an outside wall.

Choice C rationale

Evaporation is the heat loss caused by the vaporization of moisture (like sweat or bath water) from the skin surface. While this mechanism is always a factor, it is not primarily responsible for the temperature drop in this specific scenario, which emphasizes the environmental factors of the cold wall and window near the crib.

Choice D rationale

Conduction involves the loss of heat through direct contact with a cooler surface, such as the crib mattress or cold linens. Since the scenario describes the infant being near an exterior wall and window, which are not touching the infant, conduction is not the mechanism responsible for this particular drop in temperature.