Yes, the Chinese baby gender chart is only for the mother-to-be who is older than 18 years old and younger than 45 years old in lunar age to use. If your age is not in this range, you couldn't take it as a reference.
Could you let me know your date of birth and last period time? I'll help you check if your lunar age is 17.
Could you let me know your date of birth and last period time? I'll help you check if your lunar age is 17.