Redcrx is right, Sonak ~ the majority of women are designed to give birth no matter what their size..for example I know of a woman from Thailand (she was in the labour ward with me :o) and she was only 4' 11"..she gave birth to a strapping 10lb baby boy, despite being very slim & petite! I was once told by a midwife that a baby will only usually grow to the size a woman can cope with.
Whether this is true or not I don't know ;o)
It can be done..but as redcrz says, you will be monitored for baby growth.