yes it is
yes
Yes, very.
Breast development in girls starts between the ages of 7 and 13.
cos they tend to be fatter :D
yes i have a 14 year old daughter and i get mad when she sits in front of the mirror and plays with her breasts, girls love doing this. it is perfectly normal
You can get bruises anywhere. On the breasts either means she's been hit there or her boyfriend is too rough.
Yes, perfectly normal. All girls are different and will develop at different times. Some girls will start developing breasts as early as age 8, and others will not start until they're 13 or so.
some girls call it a boobiebank
Girls may have small breasts but they are still girl breasts.
Yes, it is normal to see vatiation in your breast size throughout your entire menstrual cycles but especially around ovulation and menstruation. The breasts are not growing or shrinking, the ducts in the breasts are swelling due to the effect of hormones on the breasts.
There is no specific time or age. Developing breasts is a part of puberty. People develop at different speeds and ages. Some girls develop earlier, some later than most. It is perfectly normal.
female hormones that when you hit a certain age they begin to grow it is normal for 13+ girls to start forming them