Final answer:
For a twin pregnancy, maternal energy intake should be greater than what is necessary for a singleton pregnancy, although the exact amount can vary. It's generally accepted that pregnant and lactating mothers require additional 800 Kcal/day, so the intake should lean towards the higher end of the range or slightly more, but should be personalized with a healthcare provider's advice.
Step-by-step explanation:
For a twin pregnancy, maternal energy intake should be increased to support the growth and development of the fetuses. According to recommendations, a pregnant mother requires an additional amount of about 70,000 Kcal spread evenly over the last two-thirds of pregnancy, which amounts to approximately an extra 300-400 Kcal/day for an average woman at rest.
Considering the increased demands of a twin pregnancy, the energy requirement would be higher. Based on the general need for an additional 300 calories per day during a single pregnancy, and the fact that pregnant and lactating mothers require additional 800 Kcal/day, it's reasonable to estimate that for a twin pregnancy, the maternal energy intake should be at the upper end of this range or slightly higher.
However, the exact number of calories may vary depending on the individual's pre-pregnancy calorie intake and activity level. It's important to consult a healthcare provider for personalized advice. Doubling caloric intake is a myth and is likely to lead to excessive weight gain which can be harmful. The extra energy intake supports the metabolism of the fetuses, placenta, additional uterine and breast tissues, and the extra work of heart and respiration.