Weight gain

Amy • George Westlake, born July 10. Weight: 6lbs 9ozs. He is perfect! Now for the next part of this amazing journey.. 🌻💙
Hi ladies! 
What's the usual normal and good weight gain during pregnancy? I'm sure it's probably different for every one but is there just a general sort of weight gain guide? (FTM/pregnancy if you didn't get that so far lol) I'm 27 +4 weeks pregnant with one already amazing little boy and I was 64kg before pregnancy and I am now 70.4kg - does this seem about right? 
I haven't been weighed at the doctors since my 12week appointment where I was 67kg - I weighed myself in the hospital two days ago and I was 70.4kg 😊
Pictures are 12 weeks (Minnie mouse top) and 27 weeks in the second one!
Thanks ladies! xx