Overall, infants born in the U.S. in latest years weigh slightly greater than they used to. Normal ranges for birth weight may also be totally different, based mostly on ethnic background. It slows or stops the normal circulate of bile from the gallbladder. This causes itching and yellowing of your pores and skin, eyes, and mucous membranes . But it is more widespread in the second and third trimesters. It most frequently goes away within a quantity of days after supply.