Hi Kasper,
Unfortunately the pictures are not in focus, so therefore cannot see the cheek odontodes/bristles or the odontodes on the leading pectoral fin, very clearly, which I mainly use for sexing zebras,that, together with body shape.
Therefore just going on body shape , I would say that No 1,2,3 and 7 are females. No 4,5 and 6 are either Males or Juvenile females.
Can be more accurate if you are able to post side pictures of the head together with pectoral fin.
Also check out my post on the attached link of 2.16 pm which gives a link to some pictures of male and female zebras, and sexing info.
http://www.zebrapleco.com/forum/viewtopic.php?t=514
Regards,
Des.