Yes if a woman is getting regular periods it's usually a good sign that the woman is very fertile and when you're very fertile you have a very high chance of getting pregnant.
Woman are most fertile from 18 years to 35 years of age but it's still possible to get pregnant after age 40 so there's still a chance if you wait that long.
A woman also becomes most fertile on the day of ovulation which usually occurs 12 to 16 days before the womans menstrual period begins and also the five days preceding the menstrual period.