There are too many, rarely understood processes involved in fertilisation and subsequent embryogenesis. I don&#x27;t think we can fully create a human (or even other complex life forms) fully synthetically. Rather, i think scientists would just exploit tried and tested natural mechanisms such as embedding half of the synthetic genome into the spermatazoon with the other half residing in the oocyte and letting &quot;nature&quot; take its course.<p>There&#x27;s just too much knowledge we&#x27;re missing right now (even the calcium signalling cascade initiated by the sperm fusing with the egg isn&#x27;t fully understood). Of course, who knows where we&#x27;d be in 10, 20, 50 or 100 years?