Question

During fetal development, change in a mother's body occur primarily as a result of various hormones secreted by the ___________

Total kcal/d are greatest during which stage of life?

Answer 1

The endocrine system and pituitary glands secrete pregnancy hormones such as estrogen, hcg, and progesterone.

As far as the second question goes, once you’re 51+ your body begins to need more calorie intake.