Low sperm

My husband got a semen analysis done in January his count was very low 250,000. He started taking Fertilaid after that and just got another test done. His number only increased to 600,000. I’m very grateful that it increased but has anyone’s husband taken other vitamins that helped his sperm count?

We are looking into <a href="https://glowing.com/glow-fertility-program">IVF</a> but I want his sperm to improve so we could possibly do <a href="https://glowing.com/glow-fertility-program">IUI</a>