PONGSUTHIRAK, P. Comparison between headfirst and tail-first direction of sperm for intracytoplasmic sperm injection. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 8, n. 11, p. 4177–4181, 2019. DOI: 10.18203/2320-1770.ijrcog20194601. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/7474. Acesso em: 27 oct. 2025.