Vaginal progesterone how far do I stick it up there?

Mandy β€’ πŸ’2012 πŸŽ€πŸ‘ΆπŸΌ2014 πŸ‘ΌπŸ»+πŸ‘ΌπŸ»+πŸ‘ΌπŸ»+πŸ‘ΌπŸ»2019 πŸ‘ΌπŸ» Colton James Teague June 30th 22 weeks gestation, 🌈 πŸ‘Ά due October 23 2020

Ok so I recently had to have an emergency cerclage placed and my new ob put me on vaginal progesterone to try and help with my cervix and contractions. I’m about to do my first dose but I’m sitting here now and I’m like um how far do I stick it up there?