Iskandar, P. 2021. Effectiveness of Black Pepper Extract (Piper nigrum L) Against the Number and Motility of Spermatozoa. Jurnal Ilmiah Kesehatan Sandi Husada. 10, 2 (Dec. 2021), 683-688. DOI:https://doi.org/10.35816/jiskh.v10i2.677.