Around four months pregnant with my youngest, I had a weird moment of reckoning in my kitchen. The baby was asleep, my older two quietly playing, and I sat down with my coffee and just... sat there. Not resting, not scrolling, just genuinely unable to get up and do the next thing. I wasn't sad, I wasn't coming down with something. I was just drained in a way I couldn't name.
My first instinct was the obvious: three kids under six, a Phoenix summer that starts dehydrating you before 9am, a sleep schedule that was still very much a work in progress. And honestly, some of that was real. But I'd had babies before. I knew tired. This was different.
So I did what I always do, which is read a ton. What I kept running into in my research was a concept called maternal depletion.
The basic version: your body loses a significant amount of iron during pregnancy and childbirth. Blood volume expands by roughly 50 percent during pregnancy, which means your body is producing an enormous number of new red blood cells, and red blood cells need iron to form. Then you give birth, there's blood loss, and if you're breastfeeding, the demand on your iron stores continues for months. Your body tries to rebuild. But the rebuilding takes time. Research suggests anywhere from 12 to 18 months, depending on how depleted you were going in and how consistently you're replenishing. If you have another baby before that window fully closes, you're not starting back at your baseline. You're starting lower than that.
By a third pregnancy, you may be working with iron stores that have never fully recovered from the first two.
When I actually sat with that, so much of the past few years made sense. After my first baby, I was tired but functional. After my second, I was more exhausted than I expected, but I chalked it up to having two kids three and under, which is genuinely its own category of hard and I'm not discounting that. By the time my third arrived, my body had been running consecutive laps without a real rest between them, and I had a lot less in the tank than I understood.
The part that still frustrates me: iron deficiency in its early stages is really easy to miss on standard bloodwork. Most routine labs check for anemia, which is the late-stage version when your red blood cell count has actually dropped. But there's a longer window before that, where your iron stores (measured by a marker called ferritin) are running low, and your body is already struggling, and your red blood cell numbers still look technically fine. So you go to the doctor feeling like you're running on nothing, your labs come back in normal range, and you leave with reassurance that you're probably just tired because you have small kids. Which, yes. But also, it might be worth asking specifically about ferritin.
Low iron doesn't always look the way you might picture. It's not necessarily the dramatic dizzy spells. For a lot of moms, it just looks like being a tired mom: the mental fog that settles in by mid-morning, the 3pm wall that coffee only barely gets you through, the feeling that your brain is running at 60 percent no matter how much sleep you get. It's quiet and it's chronic and it blends right in with the general noise of having small children. It gets attributed to motherhood and stress and a busy season and everything except what it actually is, and it goes unaddressed for months or years.
These days, my youngest is a year old. The difference in how I feel compared to that morning in my kitchen is real not overnight, not dramatic, but real. Getting there meant finally paying attention to what was happening in my body instead of just pushing through. Some of it was food, some was supplementation, some was just understanding why I felt the way I felt, which turned out to matter more than I expected.
It's honestly one of the reasons I built Mama Fuel with iron specifically included, in a form that's easy on your stomach because I wanted something I could actually take every day without it becoming a whole production. That consistency is the part that matters most.
Here's the link if you want to take a look → mamafuel.co