12 week scan success - boy or girl? ???

Lisa • Married 5 years to a wonderful man. Son born 26 Jan 15. Expecting another boy in Nov 16 X
Just got out of my 12 week scan, baby's heart beat was 176 BPM and on the 3D scan, bean was waving at us, it was soooo special.
​Any ideas whether this is a little boy or a girl?
​Know it early but hubby doesn't want to know but I would love to ??