The nurse administers vitamin K intramuscularly as prophylaxis to the newborn based on which of the following rationales?
Select one:

Choice A Reason: 3-2-1-0-2. This is an incorrect answer that underestimates the number of pregnancies and overestimates the number of preterm births. The client has had four pregnancies, not three. She has had one preterm birth, not two.

Choice B Reason: 4-1-1-1-3. This is an incorrect answer that overestimates the number of living children. The client has two living children, not three.

Choice C Reason 4-1-1-1-2. This is because the GTPAL method is a way of summarizing a woman's obstetric history using five numbers: G (gravida), T (term births), P (preterm births), A (abortions), and L (living children). Gravida is the number of pregnancies, regardless of outcome. Term births are deliveries after 37 weeks' gestation. Preterm births are deliveries between 20 and 37 weeks' gestation. Abortions are pregnancies that end before 20 weeks' gestation, either spontaneously or electively. Living children are the number of children who are alive at the time of assessment.

Choice D Reason: 4-1-2-0-3. This is an incorrect answer that overestimates the number of preterm births and living children, and underestimates the number of abortions. The client has had one preterm birth, not two. She has had one abortion, not zero. She has two living children, not three.

Choice A Reason: Insulin needs decrease in the first trimester, but increase in the second trimester as the woman's body becomes more insulin-resistant. This is because this statement describes the typical patern of insulin requirements during pregnancy for women with pre-existing diabetes. Insulin needs decrease in the first trimester due to increased insulin production by the pancreas, increased insulin sensitivity by the tissues, and increased risk of hypoglycemia due to nausea and vomiting. Insulin needs increase in the second trimester due to increased levels of placental hormones such as human placental lactogen (hPL), which antagonize insulin action and cause insulin resistance.

Choice B Reason: Vascular disease that always accompanies diabetes slows fetal growth. This is an incorrect answer that makes a false and exaggerated claim about diabetes and fetal growth. Vascular disease does not always accompany diabetes, but it can be a complication of long-term or poorly controlled diabetes that affects blood vessels and circulation. Vascular disease can affect fetal growth by reducing placental perfusion and oxygen delivery, but it is not the only factor that influences fetal growth. Other factors include maternal nutrition, genetics, infections, or anomalies.

Choice C Reason: The risk of ketoacidosis decreases during the length of the pregnancy. This is an incorrect answer that contradicts the evidence and guidelines on diabetes and ketoacidosis during pregnancy. Ketoacidosis is a metabolic emergency where high levels of ketones accumulate in the blood due to insufficient insulin or excessive glucose utilization, which causes acidosis, dehydration, electrolyte imbalance, and coma. Ketoacidosis can occur in women with diabetes during pregnancy due to infection, stress, starvation, or inadequate insulin therapy. The risk of ketoacidosis does not decrease during the length of the pregnancy, but rather increases in the second and third trimesters due to increased insulin resistance and glucose production.

Choice D Reason: The baby is likely to have a congenital abnormality because of the uncontrolled diabetes. This is an incorrect answer that implies a negative and deterministic outcome for the baby. Congenital abnormalities are structural or functional defects that are present at birth, which can affect various organs or systems in the baby.

Congenital abnormalities can be caused by genetic or environmental factors, or a combination of both. Diabetes can increase the risk of congenital abnormalities, especially if the blood glucose levels are high during the first trimester, when organogenesis occurs. However, the risk of congenital abnormalities is not inevitable or predictable, and it can be reduced by maintaining good glycemic control before and during pregnancy.