So there you are, staring at that glass of painfully-sweet, ultra-sugary orange liquid and wondering, “What on earth is that? Isn’t this something the doctors normally say not to drink?” Don’t freak out, it’s a normal test that all mums-to-be have to go through, sometimes multiple times per pregnancy.  What is a glucose tolerance test?  It is how your doctor or midwife can determine whether you have pregnancy-induced diabetes. Diabetes is a disorder in the way your body metabolizes sugar, and pregnant women are susceptible to developing it due to the way that baby is wreaking havoc with your hormones. No, it’s not just sudden tears and bizarre cravings for mango that come with the territory: you could get very sick if you don’t keep your blood sugar in check.