Am I Overthinking My Baby’s Weight? What I Learned From My Pediatrician
I held my 6-month-old Lila against my chest while the nurse unclipped her floral cotton onesie, the crinkle of the exam table paper loud under our shoes. It was her first well check after I started back to work part-time, and I’d already spent the week wondering if my pumped milk supply was dropping, if I was giving her enough bottle time between meetings. When the nurse jotted the weight down on her chart and leaned over to show me, my throat went tight: she’d dropped from the 45th percentile at her 4-month check all the way to the 12th.
I left the office with a referral for a follow-up weight check in two weeks, and by the time I got home, I’d already pulled up half a dozen blog posts about low baby weight gain. That night, after Lila went to bed, I searched a “home baby weight” hack, pulled out our bathroom scale, weighed myself holding her, subtracted my weight, and wrote the number down in my phone notes. I did it again two days later. I started offering her the breast every 90 minutes, even when she was happily playing on her play mat and turned her head away. I mixed a teaspoon of rice cereal into her evening bottle even though my pediatrician had said to wait until 6 months to start solids, just to add extra calories. When my partner rolled over at 2am and found me scrolling baby weight forums, he said “You’re gonna drive yourself crazy staring at that phone,” and I just said “What if something’s wrong?” He dropped it, but I couldn’t. When my sister came over for dinner, she pointed out Lila was grabbing for her fry off the plate, and I said yeah, she’s probably hungry because she’s not gaining enough. My sister just shrugged and said she looks like you, you were always the smallest kid in your class. That didn’t help, I thought. Numbers don’t lie.
When I walked in for the two-week check, I pulled up my notes app with all my home weight logs and showed the pediatrician how much Lila had gained in 10 days: barely 2 ounces, according to my scale. She looked at the list, then looked at Lila, who was squirming out of my lap to grab the blue reflex hammer off her desk, and laughed a little. She said first off, most home scales are off by 3 or 4 ounces, that’s just how they work. That number you’re logging isn’t even accurate. Then she pointed out that percentiles aren’t grades. The 50th percentile isn’t the goal, it’s just the middle. A 10-ounce drop in percentile doesn’t automatically mean something is wrong, especially when you look at the whole picture. When I told her I was 10th percentile until I was 5, and my partner was 20th percentile as a baby, she nodded. That’s genetic, she said. That’s her normal.
She asked me how many wet diapers Lila had a day. I thought for a second, I change her 6 or 7 times a day, and they’re all pretty heavy. She said that’s the first thing any parent should check, way before they fixate on the scale. If you’ve got 6+ wet diapers in 24 hours, they’re getting enough fluid, which means they’re getting enough food. There’s no way around that. Then she asked if Lila was rolling over, babbling, reaching for toys. I said she just figured out how to roll from back to belly the week before, and she babbles “ma ma” all morning long. She said that’s the second thing: a baby who’s hitting their milestones, who’s alert and playing, is a baby who’s getting enough nutrition. The number on the scale is just one data point, not the whole story. She told me to stop forcing extra feeds, stop adding cereal to her bottle before she’s ready, just let Lila tell me when she’s hungry. If she turns away from the bottle or breast, that means she’s done, not that she needs to eat more.
I went home and deleted the weight log from my phone that night. I stopped stepping on the scale with Lila between doctor’s visits. I still have moments, though. Last month at playgroup, a mom I just met looked at Lila crawling around chasing a rubber ball and said “she’s so tiny, are you sure you’re making enough milk?” And for a second, that old tight feeling came back to my throat, maybe I’m missing something, maybe I’m not doing enough. But then I remembered what the pediatrician said, and I did the quick check in my head: 7 wet diapers today, she just pulled herself up to stand on the couch 10 minutes ago, she ate half a jar of sweet potato and 10 cheerios for lunch this morning. That’s enough.
Now Lila’s 10 months old, her last well check put her at the 15th percentile, right where she’s been for the last four months. She still loves grabbing food off my plate, she can climb the three steps to our back porch all by herself, and she yells when I take the TV remote away from her. I still hold my breath a little when the nurse lifts her onto the scale at every checkup, that habit of worrying doesn’t go away overnight. I still catch myself comparing her to the chunkier babies at playgroup sometimes. But I don’t stay up at night overthinking it anymore. Some babies are just small, and that’s okay. The numbers don’t tell half as much about how they’re doing as the messy, loud, curious baby right in front of you does.
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