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Zinc in the third trimester | Pregnancy Power Hour
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Nutrition · trimester 3 · Mineral

Zinc in the third trimester

RDI: Pregnancy RDA: 11 mg/day (IOM)

In the third trimester, zinc continues its vital role in supporting your baby's rapid growth and developing immune system, alongside your own wellness.

2 min read

Quick answer

In the third trimester, zinc continues its vital role in supporting your baby's rapid growth and developing immune system, alongside your own wellness.

As you move through the third trimester, your baby is undergoing significant growth and development, maturing organs and building reserves for life outside the womb. During this crucial period, zinc remains an essential mineral, actively supporting both your baby's continued development and your own immune function as your body prepares for birth and postpartum recovery. The Institute of Medicine (IOM) recommends a pregnancy zinc intake of 11 mg/day, which is a slight increase from the non-pregnant recommendation, reflecting the body's heightened needs during this time.

Evidence suggests that adequate zinc intake is important for fetal growth. While severe zinc deficiency is uncommon in high-income countries, even mild deficiencies can be a consideration. Research from the World Health Organization (WHO) has linked zinc deficiency in pregnancy to outcomes like low birth weight and preterm birth. This highlights why ensuring a steady intake through your diet is a gentle, proactive step you can take for your well-being and your baby's development. Just as other nutrients like Vitamin E in the third trimester play a role in supporting your body's systems, zinc contributes to a robust foundation.

Focusing on food-first approaches can be a calm and clear way to meet your zinc needs. Rich sources include oysters, beef, pumpkin seeds, chickpeas, cashews, lentils, and dairy. For those following a vegetarian eating pattern, it's worth noting that phytates found in plant foods can sometimes reduce zinc absorption. However, simple preparation methods like soaking, sprouting, or fermenting legumes and grains can help to reduce phytate content, making the zinc more bioavailable. This mindful approach to food preparation can be empowering, offering you more options to support your body's needs, similar to how understanding Vitamin K in the second trimester can inform dietary choices earlier in pregnancy.

While prioritizing food sources, it's also helpful to be aware of balance. Excessive zinc intake, generally considered above 40 mg/day, can potentially interfere with the absorption of other vital minerals like copper and iron. This is why a balanced, varied diet is often the most effective and safest path to meeting your nutritional requirements. If you have questions about your intake or are considering supplements, a conversation with your care provider is always your best resource for personalized guidance. They can help you make informed decisions that align with your specific health picture, much like discussing the role of Vitamin K in the third trimester as you approach your due date.

Keep reading

  • RelatedZinc in the second trimesterIn the second trimester, zinc remains essential, supporting your baby's continued rapid growth and bolstering both your and your baby's developing immune systems.
  • RelatedZinc in the first trimesterIn the first trimester, zinc is a key mineral supporting the rapid cell division essential for your baby's foundational organ development.
  • RelatedCopper in the third trimesterIn your third trimester, copper continues its vital role in supporting the rapid tissue growth of your baby and ensuring efficient iron metabolism for both of you.
  • RelatedIodine in the third trimesterIn the third trimester, consistent iodine intake remains vital for your baby's continued brain development and to support your body's sustained metabolic needs through late pregnancy and into breastfeeding.

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Common questions

What is the recommended daily zinc intake during pregnancy?+

The Institute of Medicine (IOM) recommends a daily zinc intake of 11 mg for pregnant individuals, slightly higher than non-pregnant needs.

Brittany Nance

“Pregnancy is under-supported at every week. This is the kind of clear, calm guidance I give my one-on-one clients — and the questions worth taking back to your provider.”

Brittany Nance · Pregnancy Wellness Consultant · full-spectrum doula

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Written by Brittany Nance, Pregnancy Wellness Consultant· BADT Full Spectrum Doula · Founder, Pregnancy Power Hour
Last reviewed July 1, 2026

This is evidence-informed education from a birth-doula perspective, not medical advice. Always discuss your individual situation with your prenatal care provider.

Related
Selenium in the third trimester
In the third trimester, selenium continues its vital role as an antioxidant and supports thyroid function, both essential for your well-being and your baby's final development.
  • RelatedMagnesium in the third trimesterIn the third trimester, adequate magnesium intake continues to be vital for supporting muscle function, easing common discomforts like leg cramps, and contributing to restful sleep as your body prepares for birth.