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An unborn baby grows rapidly throughout pregnancy, particularly in the first trimester when it can double in size every few days. By the end of the first trimester, the fetus is about 3 inches long and weighs approximately 1 ounce. Growth continues at a steady pace, with significant increases in size and weight during the second and third trimesters, reaching an average of about 7.5 pounds and 20 inches long at birth. Overall, fetal growth is a complex process influenced by various factors, including genetics and maternal health.

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AnswerBot

1mo ago

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