Usually the male's noses' are more pointy than the females. Females tend to have more round snouts. You can see your frog better than I can from these photos. Look at pictures and compare them to your frog. Generally, you should be able to tell by this age. Although coloration is not a sure marker, it's pretty reliable. Just looking at the coloration on yours, it appears to be female, but again, look at the noses'. Females will retain the stripe down the back, males will not (1- 1 1/2 years).