In your 30s, 3 to 6 months is normal to conceive. After 35 it takes longer. Have your wife take the supplement vitex as it will regulate her hormones. If you’re tracking ovulation using the LH strip, an LH surge happens the day before ovulation so have sex those days. If you don’t have success by 6 months, I would also suggest castor oil packs on her ovaries. Look it up and do your research on that because it is a process and shouldn’t the done on the period and on certain cycle phase, only luteal I believe(dont quote me!) Best of luck!