What you eat before conception can shape your child's health for life.
A recent publication in the journal Nutrients was such a good reminder that maternal nutrition before and during pregnancy can have lasting effects on both maternal health and children’s lifelong well-being.
This 2026 editorial summarized 12 global references detailing how nutrition can shape pregnancy and child health. The message was pretty clear: women who started pregnancy with a better nutritional status had better birth outcomes and healthier babies.
This evidence aligns with what we now understand about how nutrients shape the developing child — influencing everything from neural development and immune function to metabolism and even future disease risk. We think it’s a pretty excellent argument for comprehensive preconception care!
Here’s what we know
1. The First 1,000 Days Are Critical
The first 1,000 days — from conception through a child’s second birthday — are a particularly sensitive window when nutrition may profoundly influence development. I remember being a medical resident and seeing an 18 month old with iron deficiency. It was notable the difference in urgency with which we targeted that young child, compared to how we approach a menstruating women (though that is also very important to address!). But for this boy, his brain was rapidly developing and failure to have sufficient iron could have lifelong consequences.
We also know that adequate intake of protein, essential fatty acids, vitamins, and minerals will help support:
- - Optimal fetal growth
- - Nervous system development
- - Healthy placental function
2. Nutrients Shape Gene Expression
Nutrition doesn’t just provide calories — they can also signal genes to turn on or off, a process called epigenetics. For example, folate — a B-vitamin — is essential for DNA methylation. Having sufficient levels before conception and early in pregnancy significantly reduces the risk of neural tube defects. And there are many other nutrients that are just as important.
Preconception Care: Setting the Stage Before Pregnancy
Research clearly shows that nutritional status before pregnancy matters — sometimes even more than changes made after pregnancy begins. That’s why preconception care matters.
- Many critical developmental processes occur before you even know you're pregnant.
- Nutrient stores take time to build — for example, iron and folate levels cannot easily be optimized overnight.
- Preconception health influences ovulation, fertility, and early embryonic development.
For couples hoping to grow their family, this means thinking about nutrition months before conception, not just after getting a positive pregnancy test!
References
Benny, P. et al. (2026). Impact of Diet, Nutrition and Lifestyle on Reproductive Health. Nutrients. 18(2), 227.
King, J. C. (1998). Maternal nutritional status: Relationship to pregnancy outcome. American Journal of Clinical Nutrition, 71(5, Suppl), 1355S–1363S.
Victora, C. G., et al. (2010). Maternal and child undernutrition: Consequences for adult health and human capital. The Lancet, 371(9609), 340–357.
