Since Zinc is a very important ingredient of various enzymes and helps in maintaining the structural integrity of the protein, it was necessary to undertake a study on the topic "The impact of Zinc and Zinc-enzyme changes during pregnancy". The experience gained over the extraction of blood samples, serum preparation, and the fact that the reduction of the concentration of Zinc increases slightly the birth rate premature, let me understood how important it was to analyze micro-nutrients such as iron and Zinc during pregnancy. There are numerous studies about Zinc in the field of dermatology, pathology, in gynecology and surgery in the treatment of wounds operators; while in the field of obstetrics, in our country there have been a few studies. This book is useful for laboratories, medical staff and patients (pregnant women).