Birthweight refers to the weight of a newborn baby at the time of birth, typically ranging from 2.5 to 4.5 kilograms. It is influenced by various factors, including the size and ethnic background of the parents. On average, baby boys tend to weigh slightly more than baby girls. Infants weighing less than 2.5 kilograms at birth are categorized as having low birthweight, which can result from factors such as premature birth or inadequate nourishment in the womb, often associated with conditions like pre-eclampsia in the mother. Conversely, abnormally high birthweight may be linked to undiagnosed or poorly managed diabetes mellitus in the mother. Monitoring and understanding birthweight patterns are important in assessing the health and well-being of newborns and identifying potential risk factors that may require medical attention.