Is your wife tracking ovulation? If not get some ovulation test strips (I recommend the pre mom ones) and get to testing. Do the deed when the line starts to darken, the day the line is the darkest and a couple days later. Reason for this is that sperm lives in the body for a couple days so if you do the deed a couple days apart during ovulation week you increase your chances. Source: me who did this exact thing and got pregnant first cycle lol