When did your baby start sleeping longer?

I have a long ways to go but my baby is 7 weeks old and up every hour and a half. He was sleeping 3 hours at a time. My first son was a terrible sleeper. He never slept through the night till he was 2. When did your baby start sleeping 6 plus hours a night?

I had my son in October and I’m pregnant again lol. I’m due end of July so hoping he starts sleeping more before then! Yay to be pregnant again with a 7 week old. We’re excited :D