Pumping Question

Cera • 26. Minnesota. 💏 Mama to Owiyokipi Win 4/5/19. Breastfeeding FTM. 🤱🏽 💞 👶🏾

When you’re pumping, how long should your sessions be? I usually just go until I slow down but I read a post that someone was going for like, half an hour. So anyways any pointers are great!