Here’s the rough timeline of puberty development for individuals with XX chromosomes. Remember, everyone is a bit different! Specifically, Black females (timeline below) tend to be about 6 months ahead of White females (add 6 months to values below):

Ages 9.5-13.5: breasts grow

Ages 10-13.5: pubic hair

Age 11: growth spurt

Age 11.5: vaginal discharge starts

Age 12: period starts