I have given you a file with difficult tasks of gynaecology and obstetrics. I want you to answer all these tasks with an explanatory answer, and I want you to explain in detail the answer of every question along with diagnosis of each task. Also, I want you to take references from books like Williams Obstetrics and Gynaecology and DC Dutta and other books to answer the questions. Please make sure you give me the most correct diagnosis.