Thanks for your query.
Prenatal folic acid
is good & essential both,so start taking as you are planning for baby.Now as you have failed to conceive even after 1.5 years of try for conception .So both of you need complete step by step work up to find the cause of infertility
.First go husband semen analysis
,followed by your own blood & ultrasound
‘Hope I have answered your query, I will be available to answer your follow up queries, “Wish you Good Health and trouble free speedy recovery”