Gestational diabetes is a type of diabetes that develops during pregnancy. It occurs when the body cannot produce enough insulin to manage blood sugar levels effectively. This condition typically arises in the second or third trimester and can affect both the mother and the baby. Women diagnosed with gestational diabetes may need to monitor their blood sugar levels and follow a special diet. In some cases, insulin injections may be required. If left untreated, it can lead to complications such as high birth weight for the baby and an increased risk of developing type 2 diabetes later in life for the mother.