The review involved the study of GDM and its possible causes during the pregnancy phase. It focused on the link between overconsumption of potatoes (Solanum Tuberosum) and increased risk of GDM during pregnancy and effects of Glycaemic index. It also proposed the surveys and researches done on the same. The study thus briefly evaluated the entire concept of GDM in Women. The Nurses Health Study II performed some surveys to prove this linkage of potatoes and GDM risk with the help of some nurses in 1989. The survey involved only female nurses which were provided with some questionnaires comprising some basic data of their diets during their pregnancy times. A journal concerning the same survey was published in the British Medical Journal in 2016 describing the whole process and significance of this survey. A rapid increase in the glucose level observed in pregnant women who consumed more potatoes in their pre-pregnancy phase. Women with higher potato consumption were examined to have increased blood sugar levels than those with lesser potato consumptions. It can be inferred from this study that women should avoid consuming more potatoes in their pre-pregnancy period, else; they may develop Gestational Diabetes Mellitus during their pregnancy which can affect both the parent and the baby.