Need advice please!

Chelsea • 34 years old, married for 8 years to the best man, have 2 and 5 year old little boys, and have our third, a girl, arriving September 1st! 🎀👶🏼👦🏼👩🏻👨🏻💙
My husband and I are TTC #1, but my husband has thyroid problems and takes medication to help. Does anyone know if this could cause infertility issues on his end? If so, what could be done?