My wife is unable to conceive. Fine!

Hello All We are trying to get pregnant from last 2 years Following are our details Husband Age 32 Weight 79 with height 5.10 not Overweight Sperm factors are fine only morphology is 4 percent for which I am taking maxoza neo since 2 months Sperm DFI is 14 percent, that is also normal Doing active work out both weight training and cardio No smoking, no drinking habit Taking regular meals on time Taking fresh fruit vegetables daily These all I am following from last 2 years Wife Age 31 years Weight 50 kg Height 5.2 little underweight Amh 1.62 Both tubes are open we did HSG XRAY all is fine She too doing active workout and taking regular meals She is taking metital and folate 9 as medicine prescribed by doctor We are trying since 2 years with no success We also did 3 IUI all got failed Please let us know the reason We are trying every alternate day from 10 to 20 as suggested by doctor We are depressed and not knowing what to do All reports are perfectly fine