What is the typical birth weight for an infant born at 28 weeks of gestational age?

The typical birth weight for an infant born at 28 weeks of gestational age generally ranges around 1000 grams (or 1 kilogram). Infants born at this stage of development are considered premature and often fall into the category of low birth weight.

At 28 weeks, many physiological systems, including those responsible for weight gain, are still maturing, which contributes to the lower birth weights observed in premature infants. In comparison, full-term infants (typically born around 40 weeks) usually weigh between 2500 grams and 4000 grams. Therefore, the 1000 grams answer accurately reflects the common outcomes for infants born at this particular gestational age, as they are still in a crucial period of growth and development.

The other weight choices represent weights that are more typical for infants born at earlier gestational ages (like 25 weeks and below) or for full-term infants (around 37-42 weeks), making them less applicable to expect at 28 weeks.