My first two letters indicate a boy, my first three letters indicate a girl?

Question

I am a seven letter English word, my first two letters indicate a boy, my first three letters indicate a girl. My first four letters indicate a boy and whole word indicates a girl.

Who am I...

Answer 1

the ans is HEROINE

Answer 2

HEROINE:-HE-boy,HER-girl,HERO-boy,HEROINE-girl.

Answer 3

The answer would be
1st 2 letter denoting a boy- HE
1st 3 letter denoting a girl- HER
1st 4 letter denoting a boy- HERO
The word itself denoting a girl- HEROINE!!