This book is the result of all experimental researches of Miro team (Mina Babazadeh Farokhran & Rogayeh Rezaee Giglo) which attempts to design and prove the diagnostic machine "Miro" for pitting edema. This device won bronze medal of MTE Malayia 2017. In this book we have tried to explain the causes of edema, preeclampsia and eclampsia and compare this Miro machine with old method "pitting edema examination.