any way to increase the frequency of letdowns?

shaket83

I feel like the only time I get good swallows from the babies is when I'm having a letdown. This happens once every 10 minutes!!! Otherwise I get so-so sucking and swallowing in between. What actually causes a letdown and is there a way to help them happen in shorter intervals? Breastfeeding for 30 to 40 minutes at a time is getting a little tiresome thanks!!!!