# Vitamin K in the third trimester

Source: https://www.pregnancypowerhour.com/nutrition/vitamin-k-trimester-3
Last updated: 2026-07-01

> In the third trimester, understanding Vitamin K's role is key for your body's readiness for birth and for making informed choices about your newborn's health, particularly regarding the universal injection.

As you move through your third trimester, your body is making significant preparations for the birthing experience. Vitamin K, while often discussed in the context of newborn health, also plays a foundational role in your own physiological readiness, specifically contributing to normal blood clotting processes. Ensuring adequate intake of Vitamin K through your diet supports your body's natural functions as you approach labor and delivery, where some blood loss is a normal part of the process. The recommended intake for pregnant individuals is 90 mcg/day.

While your body benefits from Vitamin K intake, it's important to understand its unique dynamics when it comes to your baby. Research indicates that Vitamin K crosses the placenta poorly, meaning newborns are typically born with very low stores of this vital vitamin. This physiological reality is why the universal Vitamin K injection for newborns has become a standard practice globally. This injection is a proactive measure to significantly reduce the risk of Vitamin K Deficiency Bleeding (VKDB), a serious condition that can lead to intracranial hemorrhage in infants, as highlighted by the American Academy of Pediatrics (AAP).

Many expectant parents find themselves exploring options and gathering information about this practice. It's a common question, and understanding the evidence behind it can bring clarity. While focusing on nutrient-rich foods is always a supportive approach, it's important to note that maternal Vitamin K supplementation alone does not adequately replace the newborn injection in addressing the specific needs of a baby born with low stores. This is a distinct consideration from other third-trimester nutrients like [Iron in the third trimester](/nutrition/iron-trimester-3), which directly supports your increasing blood volume.

Your third trimester is a time for confident decision-making, and this includes discussing all aspects of newborn care with your provider. Just as you might explore how [Calcium in the third trimester](/nutrition/calcium-trimester-3) supports both your and your baby's bone health, understanding Vitamin K's specific role allows you to have a calm and clear conversation about the options and recommendations for your baby's first moments. For any specific health concerns or to discuss personalized guidance, your care provider remains your best resource. This collaborative approach ensures you feel supported and informed as you prepare for birth and welcoming your baby.

Remember, focusing on a balanced intake of various nutrients, similar to how you might consider [Iodine in the second trimester](/nutrition/iodine-trimester-2) for thyroid health, contributes to your overall well-being throughout pregnancy.