Hello.am overweight and i want to fall pregnant it is possible for me?my weight it 145kg currently.. am in my early 20s

Maybe, but...: It is better to get healthy first, and then get pregnant. A 300-lb woman should work with her primary care doctor to stop eating unneeded calories, to exercise more and more each week, to clear up hormonal imbalances (if any), to clear up psychological imbalances (if any), etc... When her mind, body, and spirit are all healthy (maybe in 12-18 months), that would be a better time to get pregnant.