How do guys do semen sample

Chantelle • 👰🏼🤵🏼05/11/16 Our first angel grew their wings at 6 weeks 👼15/02/18 Baby #2 born November 20th 2018 💜 Trying for our next baby 👶🏼

Got things to take to a lab for semen analysis for my husband but he’s not sure if he has to do it at home then take it in or do it there?