I have been to traditional chinese medicine and the sinseh said it would be best for hubby to take some tonic and have 2-3 session of acupunture during my ovulation period.Even guys are healthy they can also take some tonic and "tiao" so can have or at least ensure they have healthy sperm. For Acupunture, This help in better blood flow to our organs.
I do not have the intention to do IVF yet. I would want to try traditional chinese medicine for natural conceiving. So i cant advice you on that would be better for during IVF, but Im sure it wouldnt cause harm.
Hopes it help, Just my 2 cents.