Final answer:
A primigravida client with type 1 diabetes should expect to increase her insulin dosage between weeks 16 and 20 of gestation. This is due to the doubled demand for glucose and potential overproduction of ketone bodies.
Step-by-step explanation:
In a primigravida client with type 1 diabetes, the nurse explains that the client should expect to increase her insulin dosage between weeks 16 and 20 of gestation. This is because during this time, the demand for glucose is doubled and the client may experience overproduction of ketone bodies leading to ketoacidosis. Increased insulin dosage helps to regulate blood glucose levels and prevent complications.