First time dun need prepare anything ba jus remember ur lmp date can le..
Wat Gynae will do is take ur ht n wt, blood pressure, probably a blood test, ask for ur lmp date, scan transvaginally or by abdomen, heart rate is able to detect, check for fetal pole if still early preg, measure the size of bby to determine how far r u.. Let u noe possible edd date after tat q&a