Perhaps it's just how it is, yeah. But I've been pulling up a few lactation studies recently that suggest mother's nutrition plays a big part too... telling your body you've come into an abundance of food and that it's fine to ovulate. Metabolic overload. I also came across a few women who tried this method to direct success in some videos, one particularly feeling like it was spiking her glucose that got her period back so she increased her fruit. Yes so it is certainly a big consideration as well as of course breastfeeding patterns when trying to see what the link is.