Final answer:
The average weight gain during pregnancy is about 25-35 pounds, with minimal increase in the first trimester and about 1 lb per week in the second and third trimesters.
Step-by-step explanation:
Average Weight Gain During Pregnancy
The average gain in weight during pregnancy is generally about 25-35 pounds (11.3 to 15.9 kg). During the first trimester, a pregnant person usually experiences minimal weight gain, approximately 1 lb (0.45 kg) per month. However, in the second and third trimesters, the average weight gain is roughly 1 lb (0.45 kg) per week due to increased appetite and the need to consume an additional 300 calories per day to support the growing fetus. Therefore, the correct answer to the question is 1) 25-35lb.