But it also varies from person to person, and on the creator. Not specifically genetically engineered species.
Nepleslians are essentially humans. We, as human beings vary widely in our measurements. Setting a predetermined point for that is flawed. Yamataians? They have a little leeway. You'll never see a tubby Yamataian, but you may come across a muscular, tall and rugged one. Or a dainty slip of a thing. Truth be told, we tend to break that measuring stick on here quite often. Hense, why I say flawed. Not to be an arrogant guy, I just see people not following what is outlined often enough to think nothing of it.
Like I said. It varies and is solely dependent on you as the creator. What is listed is guidelines, not necessarily there to follow, but to act as a learning tool and measuring stick to the normal average joe NPC.. If you don't want to do measurements, don't do them. Leave it blank or place an applicable 'N/A'. I do so on my male characters and instead describe things through the appearance sections.
As for females... Honestly? It is easy to learn, just apply yourself. If you don't want to learn, look at a famous female you find appealing, borrow some of her measurements, and do a mix and match to spice things up a bit. Curves are nice.
Protip: You can also delete the measurements portion from your template you know.