unfortunately i don't know the literature on this field that well just the general background so i know how most of the techniques work who some of the experts are on a couple of the topics and i can point out if a particular source doesn't seem to understand the science but i would say that it's too broad a topic and not enough is known for it to be covered in the scientific literature as a single unit that said these reviews might be useful please let me know if i can explain anything for you i've just added them to a couple of articles so you may come across them in wikipedia as well i can also recommend more sources on any specific topics of interest gene therapy is the field that's furthest along related articles of interest include vectors in gene therapy aka delivery methods and genome editing there are also techniques such as scnt where the entire nucleus is replaced this is how dolly was cloned but i hesitate to consider those genetic engineering another field that comes to mind is regenerative medicine although that article isn't nearly comprehensive this and the related field of tissue engineering mainly focus on applications such as the growth of organs for transplant starting from stem cells however it doesn't currently use much genetic engineering the closest it gets is genetic reprogramming i was extremely surprised to find that article didn't exist i've just created it as far as i'm aware the use of genetic engineering to give humans new traits as opposed to prevention or cures is mostly speculative although the techniques should apply in the same way synthetic biology is the closest in that it attempts to devise new traits but it's still just beginning and is extremely far from any application in humans i imagine that most of the descriptions of technology will be like this not yet applicable to humans but could be in the future other than that which applies to human cells in culture the scope of the article is uncertain to me most of the sources that use human genetic engineering as a viable description discuss ethics rather than science of course the ethics is important as well but my familiarity is with the science there is a lot of scientific detail that can be discussed but as i mentioned above the science itself doesn't usually use such a broad categorization the science is moving quickly an article written in may have a significantly different background context from one written in modification is easiest at the zygote or blastocyst stage there is a bit of information on how this is done at transgenic mouse it's not done in humans of course there are a lot of people who use language such as the next stage in human evolution this is something i removed from the article i think i also saw it in a couple of respectable sources when i was editing this page but it's at the least imprecise poor wording and at least in my opinion should be attributed if included it is valid under a broader definition where evolution simply means change over time but it implies some mechanism of progress or goal directedness stages so it is somewhat misleading when applied to biological evolution which doesn't have these properties i won't be available much for at least the next few days but please let me know if you have any questions if it's more than a week please feel free to remind me on my talk page since the message will drop off my watchlist