“ Predictive Factors for Sperm Retrieval and Sperm Injection Outcomes in Obstructive Azoospermia: Do Etiology, Retrieval Techniques and Gamete Source Play a Role? ”. Clinics 68, no. spe (January 1, 2013): 111–119. Accessed June 15, 2024. https://revistas.usp.br/clinics/article/view/53184.