A stomach of 5-6 month pragnant lady is increaced by how many inches??

It all depends on the size of the person and the size of the baby. I knew a girl who was 5 feet even and around 95 pounds, and you could barely tell she was pregnant up until the month she had her baby. But at the same time my cousin, who is 5'5.5" and around 140 pounds was HUGE by the fifth month. So I guess you can't say how big someone's stomach is going to be at a set time during the cycle

Here's a site that might help, just click on the link.

Size of Your Belly During Pregnancy (http://ezinearticles.com/?Size-of-Your-Belly-During-Pregnancy&id=168106)

Everyone is different. When I was 5 months you could hardly tell I was pregnant but during and after the six month I got really huge!!

The way we measure at the hospital is from the top of the pubic bone to the sternum. You should measure, centimeters, close to the number of weeks you are.