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Yes they can. Some even before that age.

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Q: Can breast formation start before start of periods in a 9 year old?
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If your breast are sore is it from your menstrual cycle?

Yes. They'll start hurting before you start.


Is it natural to get lots of mucas before you start your periods?

i think so, i get it :/


Can you get pregnant right after your pregnancy?

As soon as you start having periods again, yes. It's a myth that breast-feeding prevents pregnancy - it doesn't


Why do my breasts get bigger before I start my period?

Before a woman's period, she will retain water. That will cause a temporary slight increase in breast size.


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What happens in girls in puberty?

you get gunge in your vagina, you start getting mature, you start to grow taller, you grow pubic hair, you get hairs under your armpit, you get oilier, you get teenage spots, your breast gets larger, your hips start to curve but your waists grow at the same pace, you get heavier, your hair gets greasier, your start your periods, you get alot tougher (when you fall and hurt yourself, you wont cry as much as you did before puberty).


How is a breast formed?

Breast formation in girls is undergo a process which happen in the age of puberty, in stage of puberty normally age 9 to 13 yr there happen many changes in girls body and the devlopment of breast is an important phase and many chemical and physical changes happen with this... At first the Hypothalemas gland of girls secrate GnRH hormone and this hormone excited the Pituitary gland to secrate the hormones FSH and LH and these hormone attach to the ovaries and order them to secrate the girl sex hormone then the ovaries start to produce the oestogen and progesterone hormone these hormone make the body of girl to enter in adelosent stage and do many changes internally and outside also. These hormone start the bone lengthning, uterus development, sectation of lubricant from genital area and also breast formation. In early stage of breast formation the girls chest areas fat start to collect and after some time the get more fat and a fatty area developed there. In the time of pregnancy the fatty area of breast start to make lobules like structures and these lobules collectevly called lobes, and after delivery they start to form milk by the effect of prolactine hormone...


What is yellow crust in your underwear?

Before you start your periods, you get a "discharge" of which is the yellow crust. Its completely natural. It starts off as being a light colour but closer to the start of your periods, it turns to a caramel color. Don't worry, every woman gets it ;)


Where on the breast does breast cancer start?

The truth is that it could start anywhere on your breast. But most of the times breast cancers start on your left breast and on outer and upper quadrant (if you divide breast in four parts by two perpendicular lines).


During pregnancy when do you start to get stretch marks on your breast?

During pregnancy when do you start to get stretch marks on your breast?


Im 11 my breasts are growing but im not having my period is this normal?

Yes. Periods can start any time up to 2 an a half years after breast 'budding'. Follow the link below.