# Impact of Nutrition on Embryo Production in Cattle: Mechanistic Insights

## TL;DR

This paper reviews how nutrition affects embryo production in cattle, showing that balanced diets improve embryo quality and reproductive success.

## Contribution

The paper provides mechanistic insights into how specific nutrients influence embryo production and reproductive technologies in cattle.

## Key findings

- Negative energy balance disrupts endocrine signaling and reduces embryo yield and quality.
- Micronutrients like selenium, zinc, and omega-3 fatty acids enhance embryo viability and survival.
- Early-life nutrition impacts long-term reproductive capacity through ovarian reserve and epigenetic effects.

## Abstract

Reproductive success in cattle, especially when using technologies like superovulation, embryo transfer, and in vitro embryo production, depends greatly on the number and quality of embryos produced. Nutrition is one of the most important factors influencing these outcomes. Proper feeding supports hormone balance and healthy ovarian function, which are necessary for producing high-quality oocytes and viable embryos. When cows experience poor energy balance, such as during early lactation, they may produce fewer and lower-quality embryos due to metabolic stress and increased fat breakdown. Adequate protein, vitamins, and minerals, such as selenium, zinc, and vitamins A and E, help to protect cells from damage and support normal embryo development. Beneficial fats, including omega-3 fatty acids, also contribute to improved embryo survival. In addition, nutrition during early life can influence a heifer’s future reproductive performance. Overall, consistent, well-balanced feeding programs are essential for maximizing the success of reproductive technology and supporting long-term herd productivity and genetic improvement.

Reproductive efficiency in cattle is critically dependent on embryo quantity and quality, particularly in assisted reproductive technology (ART) programs such as superovulation, embryo transfer, and embryo production. Nutrition is a key determinant of embryo yield through its regulatory effects on metabolic signaling, ovarian function, oocyte competence, and early embryogenesis. This review synthesizes the current evidence describing mechanistic links between nutritional status and embryo production in dairy and beef cattle across both in vivo and in vitro systems. Energy balance, protein supply, micronutrients, and fatty acids influence metabolic hormones including insulin, insulin-like growth factor-1, and leptin, which regulate hypothalamic–pituitary–gonadal axis activity, follicular recruitment, and steroidogenesis. Negative energy balance disrupts endocrine signaling, elevates circulating non-esterified fatty acids, increases oxidative stress, and impairs oocyte mitochondrial function, resulting in reduced embryo yield, compromised blastocyst quality, and diminished cryotolerance. Targeted micronutrients such as selenium, zinc, vitamins A and E, B-complex vitamins, and omega-3 fatty acids enhance antioxidant capacity, membrane integrity, and epigenetic regulation, thereby supporting embryo viability and post-transfer survival. Furthermore, early-life nutrition programs long-term reproductive capacity by influencing ovarian reserve establishment and oocyte epigenetic competence. Strategic nutritional management is therefore essential to optimize ART outcomes and promote sustainable genetic progress in cattle production systems.