When a mortal becomes a vampire, their body begins to change. Some things happen slowly, some instantly.
The slowest change to take place is the actual substance of the body. An immediate change will be noticed as the body becomes 'hard', but still limber. The flesh will seem harder to the touch, but still like a living substance. The body hardens more over time, slowly changing in substance. As this change occurs, the skin becomes less and less vulnerable to sunlight. Even after millennia, however, the sun is still a danger. Only a couple vampires have ever survived long enough to be invulnerable to sunlight. (Sunlight will be discussed more later on.) As a result of this change, their skin does not absorb anything.
Vampires are immortal. They will eternally appear to be the age they were when they were made into a vampire.
When the body dies, only the nervous system and the circulatory system remain functioning.
The lungs stop; vampires do not have to breath, although they may appear to do so.
The digestive track changes, joining the circulatory system.
It is suggested that the reproductive organs may still function if given enough blood. (The 'rule' that the reproductive organs no longer function does not seem to be universal in Anne Rice books and has been broken in some Brave Ireland RPs. Any use of this, however, should be kept to the appropriately rated games.)
Vampires cannot impregnate. Neither can they become pregnant. They are infertile.
Nothing is said about a pregnant mortal woman becoming a vampire. In theory, she would either be eternally pregnant, or the baby would die.
Most vampires are beautiful. This has nothing to do with any change that takes place. Vampires simply like beautiful people, and therefore will usually turn only beautiful people into a vampire.