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Related Experiment Videos

Protein metabolism during pregnancy.

J C King

    Clinics in Perinatology
    |September 1, 1975
    PubMed
    Summary

    Pregnancy alters protein metabolism for tissue synthesis, primarily driven by hormones. Nutritional intake, especially protein and energy, impacts maternal and infant health outcomes.

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    Area of Science:

    • Physiology
    • Nutritional Science

    Background:

    • Protein metabolism undergoes significant adaptations during pregnancy to support increased tissue synthesis.
    • Hormonal changes are the primary drivers of these metabolic adjustments in pregnant individuals.

    Purpose of the Study:

    • To examine protein and nitrogen retention during pregnancy.
    • To evaluate current protein recommendations and their relationship with energy intake and maternal/infant outcomes.

    Main Methods:

    • Analysis of nitrogen and protein retention rates during the latter half of pregnancy.
    • Review of existing literature on prenatal diet, nutritional recommendations, and pregnancy outcomes.

    Main Results:

    • Nitrogen retention averages 1.1 gm N/day in late pregnancy, exceeding theoretical needs for fetal growth, suggesting maternal tissue accretion.
    • Protein utilization is enhanced by adequate energy intake; current recommendations (30 gm additional protein/day) assume energy needs are met.
    • Prenatal nutritional supplements show benefits primarily in undernourished populations.

    Conclusions:

    • Maternal physiological adaptations, including fat-free tissue gain, account for the observed nitrogen retention during pregnancy.
    • Current protein recommendations appear adequate for healthy pregnant women consuming to appetite, provided energy needs are met.
    • Prenatal diet quality is linked to infant health and pregnancy outcomes, with greater impact in undernourished women.

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