If a woman born in '81 has a child born in '06, didn't she marry early?

‌She must have married at least by '05.
If the man is the same age, he might not have even graduated from university yet;
If the woman was born after the 2000s,
isn't marrying at 25 considered very early?
If she was born in the mid-90s, I'm not sure if it would be considered early;