About Author: I have completed my PhD in Obstetrics & Gynecology Nursing I also have 13 years' experience in teaching including clinical as well as administration. I have attended plenty of conferences on national and international level, published papers in the journals also I have the membership of Nursing Teacher Association, I am looking forward & interested to inculcate scientific attitude towards new generation by introducing new books to readers thank you The present book is useful for academic studies, science faculties mostly useful for research HONOUR: I feel proud and grateful writer to express my heartfelt thanks to publisher, supporting technical staff who have made this dream true. I would like to offer my gratitude by thanking all the supportive intellectuals & sincere readers for their attention towards this book, who have always been supportive and encouraged me to strive for excellence.