Veins on the breast can be a symptom of pregnancy... it was for all of mine very early on. I don't know what else may cause that so whether you are pregnant or not you should probably contact your doctor about it.
Yes
Yes. Mine started to become noticeable at about my third month, but everybody is different.
You are probably pregnant.
The breast tenderness is "normal," and very common. Estrogen levels climb during pregnancy and so breasts can become very tender. I had the same problem, as do many women.
Well your breasts will grow for a while. When you gain weight, start birth control, or become pregnant your breasts will increase in size. But once you are pretty much done with puberty your breasts won't continue to grow on there own, buy only from another independent factor.
Why in the world would somebody become pregnant to a pillow? No, you can't become pregnant to a pillow.
Chromosones become visible during prophase.
The size of your breasts are determined by DNA. When you gain weight all you are adding is fat to your breasts and this has been shown to be a contributing factor in some breast cancers. Your breasts will change when you become pregnant. There is nothing you can do, except surgery, to change the size of your breasts. Some breast exercises will firm them, but not add to size. Get a good bra that also helps.
There is no age for it. Some women never wear bras. Start wearing a bra when your breasts are becoming to heavy. If you have small breasts you may never need the nasty things. For swimming suits/ nakedness in public places, I would say, start covering it when the breasts become really visible.
Some pregnant women lose their balance because their posture changes. Their breasts become larger as well as their stomach and the curvature of the back is increased. All of these factors affect a women's sense of gravity.
Sore breasts may be an indication of hormonal changes such as ovulation, menstruation, or pregnancy. Sore breasts can also be an indication of breast growth, particularly if you're in your teens.
Interphase as they become decondenced