There are tools available that can uncover random number generators used by a game; unfortunately, they're not as straightforward as looking for a food value, and as I understand, not particularly reliable. (A programmer might use a method for coming up with a random number based on a system the tool doesn't recognize) I personally found food, tech points, food in the hive, and food in the trees, while I was trying to determine how much villagers ate; it was easier to monitor in an external application that way. But those are all easy.

As for nursing, that's probably not a count-down; timers as well, generally aren't a value of minutes or seconds; very often the countdown is in milliseconds, or in some other format. In addition, I doubt VV is using a timer, per se; since it's based on the system clock, it's more likely to be simply subtracting the current time from time the baby's scheduled to be born; the only way to train that would be to find the time the birth is scheduled for, which will be a different time, and stored in a different place, for each villager. It also would not change regularly, denying you the option of using successive searches to narrow the field of values.