Why Doses Rise, Then Stop

GDM treatment is not set once. It follows a predictable arc, and knowing the shape of it prevents unnecessary worry.

Through the second and third trimesters, your placenta grows and its hormone output rises. Insulin resistance rises with it. So doses that were right at 30 weeks are often not enough at 34, and may need increasing again by 37.

This is expected. An increasing dose is not evidence that your GDM is getting out of control or that you have slipped — it is the treatment tracking a moving target.

Then delivery happens, and the placenta is delivered with the baby. The hormones driving the resistance leave at that moment, and insulin requirements fall sharply and immediately. Insulin started for GDM is usually stopped straight after delivery.

That abrupt change is why your glucose is monitored around and just after the birth, and why doses are not simply continued out of habit.

It is also why the story does not quite end there. Blood sugar returning to normal after delivery is the expected outcome, and it needs confirming rather than assuming — which is the entire purpose of the test at four to twelve weeks afterwards.