Use of equine chorionic gonadotropin (eCG) in Mashona heifers, under a J-Synch synchronization protocol, and its effect in pregnancy rate: Use of equine chorionic gonadotropin in a J-Synch protocol in heifers. Agro Productividad, [S. l.], 2023. DOI: 10.32854/agrop.v16i3.2387. Disponível em: https://mail.revista-agroproductividad.org/index.php/agroproductividad/article/view/2387. Acesso em: 17 apr. 2026.