Hey ladies I have a question. How long after your baby start3d sleeping through the night did your fertility return? With my first, I got my period back at 3 months postpartum and got pregnant at 5 months postpartum. He didn't start sleeping through the night for 12 hours until 6 months old, so after I was pregnant. With this baby, she is 8 weeks old and sleeps for 9 hours straight at night. I'm just wondering when I should expect my period to return since it returned the first time when my son didn't even sleep that long.