In this historically strong cattle market, it’s important that cow-calf producers don’t let record-high calf prices create a false sense of security. Production efficiency should remain the number one priority. Common sense and experience tell us that high prices can – and often do – come down.
Reproductive efficiency is, and always has been, the primary driver of profitability in the cow-calf sector. In fact, numerous economic analyses demonstrate that metrics like calf crop weaned per cow exposed are significantly more important than measures such as weaning weight.
During this pivotal time of herd rebuilding, we have the opportunity to shape the productivity of future generations. That’s the core of generational nutrition, also known as fetal programming – the idea that how we feed and manage cows during gestation influences not only the calf inside her but also the long-term performance of future generations.
What is generational nutrition?
Generational nutrition refers to the impact of maternal nutrition on the developing fetus, its lifelong health and productivity, and the performance of future generations. These effects are driven by epigenetics – changes in gene expression triggered by environmental factors like nutrition and stress. We’re not altering the underlying DNA sequence, but we are influencing how those genes are expressed.
This concept gained attention after a landmark study of women pregnant during the Dutch Hunger Winter of 1944-45. Researchers found that the timing of calorie deprivation during pregnancy correlated with specific health challenges in their children later in life. For example, third-trimester calorie deprivation was linked to increased asthma risk due to disrupted cardiopulmonary development.
In beef cattle, we now understand that every trimester of gestation plays a critical role in shaping the calf’s future, and nutrition is pivotal each step of the way.
Trimester by trimester: What’s at stake
- First trimester: Early limb and organ formation begins. Nutritional deficits during this stage can lead to pregnancy loss or long-term developmental challenges. Research from Carl Dahlen’s lab at North Dakota State University shows that maternal mineral intake during this stage affects fetal organ size, mineral concentrations in tissues and even gene expression related to mineral metabolism.
- Second trimester: Muscle cells multiply (hyperplasia), setting the foundation for total muscle volume. Adipocytes (fat cells) also begin forming, influencing marbling potential and carcass quality.
- Third trimester: Rapid fetal growth occurs; about 75% of total fetal weight is gained during this phase. Final development of the heart and lungs takes place, making this stage critical for respiratory and cardiovascular health.
Meeting the modern cow’s needs
Today’s cows are bigger and more productive than ever. A 1,400-pound cow has significantly higher nutritional requirements than her predecessors, and those needs fluctuate throughout the production cycle, from dry gestation to peak lactation.
To meet these needs, it’s important to balance forage quality with targeted supplementation. That includes not just energy and protein but also macro- and trace minerals. These essential nutrients are key players in the overall health of the cow, the reproductive process and the lifelong productivity of her calf.
- Zinc: Supports immunity, DNA synthesis and replication, and epithelial tissue integrity
- Manganese: Critical for reproduction, immunity and bone and cartilage synthesis
- Copper: Integral in immune function, iron metabolism and reproduction
- Cobalt: Promotes fiber digestion and is key in vitamin B12 synthesis
- Selenium: Crucial for antioxidant function, promoting immunity and thyroid hormone metabolism
In herds using artificial insemination, a strong mineral program has been shown to improve first-service conception rates. Research also shows heifers reach puberty 19 days earlier – at a lower bodyweight – when their dams were fed good minerals during pregnancy. Earlier puberty leads to multiple cycles prior to first breeding, which has been shown to increase the odds of breeding success. Heifers that calve early during their first calving season are more likely to remain in the herd long-term.
Nutrient availability varies
While minerals are present in forage, producers can always benefit from trace mineral supplementation. And not all sources are created equal. Trace minerals from many inorganic sources have limited absorption and can interact antagonistically with other minerals or diet components, interfering with uptake.
An amino acid complex form of trace minerals that is soluble, stable, absorbable and metabolically available allows cows to absorb and utilize more of these essential nutrients. If you’re not sure about the contents of your mineral supplement, a transparent conversation about ingredient sources and concentrations with your mineral supplier can help you make informed decisions.
Buying females? Ask about their nutritional history
If you’re buying heifers or bred females to rebuild your herd, their nutritional status is important. If possible, ask how those females were fed prior to your purchase. And if you don’t know their status, it’s still a great idea to start them on a solid mineral program and manage body condition right away. You can’t change the past, but you can set them up for success going forward.
Bottom line: Nutrition is a long-term investment
Prioritizing trace mineral nutrition is a management practice that sets your herd up for ongoing reproductive success and profit potential. Whether you’re developing replacements, managing bred cows or buying females from outside your herd, don’t cut corners.
Feed the cow like she’s carrying your future – because she is.
