There is no good time for your wife to conceive baby boy in the rest of 2016 based on the Chinese Baby Gender Chart. If you believe the chart, you'd better try in the next year. If her period is during one of the following time in 2017, you are suggested to try on her ovulation date after her period ends.
February 26 - April 25 May 26 - June 23 September 20 - October 19
There is no good time for your wife to conceive baby boy in the rest of 2016 based on the Chinese Baby Gender Chart. If you believe the chart, you'd better try in the next year. If her period is during one of the following time in 2017, you are suggested to try on her ovulation date after her period ends.
February 26 - April 25
May 26 - June 23
September 20 - October 19
More ways to raise the chance for baby boy:
https://www.yourchineseastrology.com/ways-to-get-baby-boy.htm