Eh jangan risau sangat lah! Actually 1.593kg at 32 weeks is within normal range, some babies estimate kecik sikit, some besar, tergantung genes and placenta efficiency. A few mums I know their babies juga estimate around that weight or less at 32 weeks, then lahir normal healthy je, so the scan estimate boleh jadi off by a few hundred grams. What matters more is yang baby ni growing steadily on the curve, did your doctor say growth pattern looks good? Kalau yes, then very likely everything is fine, tapi of course best to just double-check dengan your doctor what they think about the trajectory and whether any follow-up scans diperlukan. Try not to stress too much about the number itself, babies surprise us all the time!