Periods

When did your periods come back after your babies? I’m just wondering if there’s any rhyme or reason to it. I know every one is different. My first baby I started my period back within 3 months. My second baby I’m 6 months and no sign of her. Which I mean is great, but I lost one of my ovaries to a cyst and have been worried we will have even more struggles getting our next to us. Both babies were/are breastfed though I felt like my first fed way more frequently than my second.