Final answer:
The calcium intake required during pregnancy and lactation is 1500 mg/day. Consuming enough calcium-rich foods and obtaining sufficient vitamin D is important during this period.
Step-by-step explanation:
The calcium intake required during pregnancy and lactation is 1500 mg/day. During pregnancy, a woman's calcium needs increase to support the growth and development of the fetus and to maintain her own bone health. Similarly, during lactation, calcium is needed to support milk production. Consuming enough calcium-rich foods such as milk, cheese, eggs, lentils, nuts, and green leafy vegetables is important during this period. Vitamin D also plays a crucial role in calcium absorption and can be obtained through sunlight exposure or dietary sources like fish liver oil, egg yolk, and milk.