[snickerbockers]

9 pregnant women produce one baby/month on average (assuming no miscarriages or late births,etc).

On paper your CPU can execute at least one instruction per core per cycle but that's on average too, if you actually only have one instruction to run it takes several cycles.

[hirako2000]

But the context is to throw 9 women at the problem of having no conception and the hope to get a baby within a month.