How much data do I need to share, and how much is enough?

Title: 
How much data do I need to share, and how much is enough?

The more information you can contribute about your history with PPCM, the better!

PPCM- R will continue to evolve as research advances. Additional surveys may be added and existing ones may change based on future need. Some will be shorter because only a few answers are needed; others will be more comprehensive, as needed, for research.