Final answer:
Insulin requirements for a pregnant woman with type 1 diabetes will increase during pregnancy and remain increased after delivery.
Step-by-step explanation:
In a 25-year-old primigravida with type 1 diabetes mellitus, insulin requirements will increase during pregnancy and remain increased after delivery. This is because pregnancy causes hormonal changes that can increase insulin resistance, leading to higher insulin requirements. Additionally, blood glucose levels need to be tightly controlled during pregnancy to prevent complications for both the mother and the baby.