Why did Bella become a vampire in the 4th book????o.O

She became a vampire because her body gave out while giving birth to Renesmee.... and because she wanted to become a vampire...so that she could be with Edward forever.

bcoz bella and edward had sex and had a baby. the baby was breaking her bones (i think) then before that, she had already wanted to be a vampire so edward injected his venom inside her and taa daa. she became a vampire. sorry.. my explaination very bad. goo read the books urself barhx. maybe you'll get a better understanding ;)

Because she was stupid and didn't choose the werewolf. Oh well, I guess the sexy beast is mine. (:

Because she loves edward and wanted to be as strong and as able as him, she didn't want to be vulnerable any longer. Hope this helped :)

i think she became a vamp in the first but the segundo book of breakingdawn is gonna talk about bella been a vamp

she had always wanted to be a vampire since the first book in the fourth she wouldn't let them abort nessie so it became either death or vampire on there honeymoon she was willing to wait a few years but a miracle happend she ended up pregnant on the honeymoon and Edward wouldn't lose her again no matter what it would cost

because bella loves edward so much so wants to be with edward forever and becoming a vampire is the only way...

because edward bit her when she was about to die while delivering their child ...

Bella's coração gave out when giving birth to her daughter Renesmee

because she was pregnant

Plain and simple: she wants to and because she'll die.

what people seem to be leaving out is that Bella was willing to die for their daughter and it was how the Cullens became vampiros on the verge of death. She did want to become a vampire but she also would have died for their daughter. Edward could not live without her so he changed her. I agree read breaking dawn.

Becuz while she was given birth she was dying and edward didnt want her to die cuz he loved her so much so he turned her into a vampire