Rho immune globulin (Rhogam) will be ordered postpartum if which situation occurs?

A) It could make respiratory distress syndrome worse:
The most critical reason to protect a preterm infant from cold stress is that hypothermia can exacerbate respiratory distress syndrome (RDS). Cold stress leads to an increased oxygen demand, which can worsen the infant’s already compromised respiratory function. In preterm infants, the immature lungs and underdeveloped surfactant production contribute to RDS, and hypothermia worsens the situation by increasing metabolic demands and impairing pulmonary function. Maintaining a stable body temperature is crucial for minimizing respiratory complications.

B) Shivering to produce heat may use up too many calories:
While it is true that preterm infants may not have the metabolic reserves to generate heat via shivering (as they lack significant brown fat), the primary concern is not shivering. Preterm infants generally do not shiver, and cold stress does not trigger this response. Instead, their body tries to conserve heat through vasoconstriction and increased metabolism, which can lead to hypoxia and worsening respiratory distress.

C) A low temperature may make the infant less able to digest nutrients:
Cold stress can affect a preterm infant’s gastrointestinal function by reducing blood flow to the digestive organs, which can impair nutrient absorption and digestion. However, the most immediate and serious consequence of cold stress is the increased metabolic demand and worsening of respiratory distress, rather than a direct impact on digestion. Protecting the infant from hypothermia helps prevent these secondary complications.

D) Cold decreases circulation to the extremities:
While cold stress can indeed lead to vasoconstriction and decreased circulation to the extremities, this is not the most significant concern. The primary issue with cold stress in preterm infants is the overall increase in metabolic demands, oxygen consumption, and exacerbation of respiratory problems, which can lead to more severe respiratory distress syndrome. The loss of peripheral circulation is a secondary concern.

A) The vaccine is a live virus and may cause birth defects in the fetus:
The Rubella vaccine is a live attenuated virus, which means it contains a weakened form of the virus. Although this vaccine is safe for most adults, it can cause serious birth defects if a woman becomes pregnant within a 4-week period after receiving the vaccine. The live virus could potentially affect the developing fetus, causing congenital rubella syndrome (CRS), which can result in severe birth defects like heart defects, deafness, and cataracts. To prevent any risk to a future pregnancy, women are advised to wait at least 4 weeks after
vaccination before trying to conceive.

B) Tests to determine if the client developed immunity are not accurate for a month:
This is not accurate. While some tests for rubella immunity can be done soon after vaccination, the primary reason for delaying pregnancy is the live virus in the vaccine, not a delay in testing. The immune response to the vaccine typically develops within a few weeks, but the risk to a fetus comes from the live virus, not the testing process. The 4-week delay is to ensure that the virus has been cleared from the body before pregnancy is attempted.

C) She may have the virus and feel too sick to tolerate a pregnancy:
While the Rubella vaccine can cause mild side effects like fever, it does not typically cause significant illness that would prevent a woman from tolerating a pregnancy. The primary concern is the safety of the fetus, not the mother's symptoms, as any illness is generally mild and transient. The 4-week delay is to prevent potential harm to a fetus due to the live virus present in the vaccine.

D) Her body is not ready to nurture another pregnancy so quickly:
This rationale is not based on any medical guideline. There is no evidence to suggest that the body needs time to "recover" from the Rubella vaccine before becoming pregnant. The reason for the 4-week delay is to ensure that the live virus has been cleared from the body to avoid any risk to a potential pregnancy. The concern is not about the woman's ability to support another pregnancy, but about the potential for the live vaccine virus to harm a developing fetus.