there is also a consition called cholestasis--if u notice the itching is mostly on ur palms or bottom of ur feet but it may be all over as well, then talk to ur health care provider (midwife, dr, etc) and ask for a 'bile salts' test..they will test the level of bile salts in your blood to determine whether or not it is cholestasis..
there is a site with lots of info
www.itchymoms.com as well as a yahoo group i found extremely useful...to the point that my doc was goin to prescribe something to me that has NOT been proven safe for pregnancy and i did the researchand found there is something out there that *is* safe for pregnancy and told him to prescribe that
anyway it's good that u ask but dont get too worried, just do some reading adn ask ur healthcare provider what they think
if u have any questions pm me
gtg. dd's getting annoyed
hth