Hypertonia is common in preemies, that's why I asked.No, thanks for asking. have you considered seeing a physiatrist? Or a neurologist? High tone is also common in babies with seizures. We're in a holding pattern until we see what happens with babbling, motor development, and weight gain (tanked from 25th percentile to 3rd) over the next month. I'm jumping the gun and checking the wait time at the Children's CP clinic. Bouncing some follow up questions off the pedi at the older kid's checkup next week. DS1 was like a 2x4 at birth. Literally. I never had squishy newborns, it was hard to bend them to get them in carseats.He's like a plank putting him the carseat sometimes, have to bend at the hips. Also very hard to get him into a sit. Have to forcibly bend the knees and hips to begin a bicycle on his back, and even then he locks up from the hips and arches. Doesn't bounce when in a supported stand, just locks. He hates diaper changes. I've been joking that he's already a nevernude, but I'm thinking the tone issues are factoring there, too.