Constipated Preemie

Arquette • Preemie born February 20,Due April 15! In love with my peanut! 💕🎀👑🚺
My LO just came home from the NICU on Tuesday and she's only had one bowel movement since. I called the doctor and they said to give her a glycerin suppository. I was wondering has anybody else's baby been constipated and what did you do to relieve it?