When you have a piece of code you want to run x number of times, then code within that code which you want to run y number of times, you use what is known as a nested loop. In Python, these are heavily used whenever someone has a list of lists-an iterable object within an iterable object.1  Early exits.f you've done any programming before, there's no doubt you've come across a for loop or an equivalent to it. In Python, they work a little differently. Basically, any object with an iterable method can be used in a for loop in Python.
If the result is abnormal, it is typically followed up with a fasting blood glucose test or a GTT. Glucose blood tests are also used to screen pregnant women for gestational diabetes between their 24th and 28th week of pregnancy.
In fact, only about a third of women who test positive on the glucose screen actually have the condition. If you test positive on the screening, you'll need to take the glucose tolerance test (GTT) â a longer, more definitive test that tells you for sure whether you have gestational diabetes.ost healthcare practitioners routinely recommend a glucose screening test (also called a glucose challenge test or GCT) between 24 and 28 weeks of pregnancy to check for gestational diabetes. Ultrasound exam Find out what doctors look for and how ultrasound exams are done.