Husband’s semen analysis

Kaitlin • Married 💍 👧🏼 2 MCs👼👼 🌈 due 11/27/2018 with another 👧🏼

My husband got his semen analysis back the results say that everything is on the lower side of normal and the healthy sperm is 2% when it should be 4%. The dr recommended vitamins and abstaining for a longer period before ovulation. Have any of your husbands had these results? Any recommendations on how to boost everything?