There are too many factors that go into pregnancy to give a definitive answer. Chances are good, but if he is less infertile than most, a problem. Fibroid tumors, another problem. Stress, nutrition, hormone levels, any number of things can be a problem. Just enjoy the process! It will happen when it is supposed to, and if it doesn't happen in a timely fashion, consult a OBGYN.
The most fertile period is that period in a woman's life when her chances of getting pregnant are the highest.
What Are The Chances of Getting Pregnant During Ovulation
What Are The Chances of Getting Pregnant During Ovulation