The only way to tell the gender for sure is thru U/S....And that's only if the little one wants to cooperate! Best wishes.
im planning to go for 4d u/s by nxt month sure on that time it can already tell me my baby gender, i have 7 y/o daughter and were hping to have a boy this time, also excited to buy baby dresses.
I'll let you know after iltrasound.
Thanks a lot, and Good luck!