My results after doing the 1 hour gestational diabetes test screening was 152 & the cut off was 135. what are the chances that i will pass the three hour test?

It is not feasible to give you the chances. It is important for you to take the 3 hour test. The one hour test is a screening test and screening tests are set a high sensitivity and often have false positives. Wish you good health and a healthy baby!

a properly done glucose tolerance test giving a reading of "152" after one hour will probably be normal at 3 hours. This may mean "pre-diabetes" , but your physician can provide diet advice which may prevent advancement to type two diabetes.