The chapters in this book emphasize the critical role that reproductive sciences play in wildlife conservation, highlighting the significant progress that has been made since the first edition was published a decade ago. While initially, there was significant excitement around technologies like cloning and bringing animals back from extinction, practical limitations and ethical concerns have since tempered expectations. This new edition underscores that while advanced reproductive technologies can contribute to conservation, they are not standalone solutions for reversing wildlife population declines. Instead, multidisciplinary approaches that integrate environmental science, reproductive biology, and ethical considerations are essential. Key insights from these chapters include how important it is to understand the developmental origins of health and disease in wildlife, especially given how environmental stressors such as pollutants and climate change can affect reproductive success across generations. Papers also discuss the challenges posed by endocrine disruptors and microplastics, which threaten both terrestrial and aquatic species. Advances in noninvasive reproductive monitoring techniques for large marine mammals and birds are highlighted as promising tools for conservation efforts. However, one must be cognizant of ethical concerns central to conservation biology, particularly regarding the use of reproductive technologies in endangered species. The need for minimally invasive methods and more holistic experimental designs is stressed, alongside the importance of balancing scientific innovation with animal welfare. A central theme running through these chapters is the need for enhanced interdisciplinary collaboration, training programs, and public engagement to ensure that wildlife conservation efforts are sustainable and effective in the face of ongoing environmental and anthropogenic challenges.