I had DH try it for about 3 months but he sucks at taking vitamins which is funny since he has no problem remembering to take his anxiety prescriptions, men. We didn't get pregnant in that time but I think if he had taken it more consistently it would have increased our chances. The bottle says it takes about 3 months to really be effective anyway. We did end up getting a natural BFP months later though, doubt it was related but really never know. DH has very low motility (3%) and low morphology as well so the odds of us conceiving naturally were very very low.