But not the Rhubarb Panic

I laughed at this post by Simcha Fisher.  She’s pregnant, too.  She has pregnancy insomnia, too.  She ends up thinking about totally irrelevant things in the middle of the night, too.  I have to admit, I haven’t had the Rhubarb-Related Panic, but I did have some pretty good times lying awake thinking whether we had enough strawberries for this or that project (…and if so, how was I EVER going to get all those projects done?  Would I need to freeze the berries first?  Would that affect how the jam turned out?  How could I find that out?  Without wasting a whole bunch of berries, if it doesn’t work?  Should I just be freezing berries for smoothies anyway?) 

And I’ve planned out all of the house projects we’ll need to do for the next 5-10 years.  Because sometime between 1 a.m. and 4 a.m. is always the best time for things like that.  And the planning needs to be done now, of course.  Happily, the plans I’ve made aren’t completely insane (always a danger with plans made at that hour), so we may actually use some of them. 

So my question is:  why is pregnancy designed thus?  It seems to be a common thing that pregnant women experience insomnia at a time when you’d think that their bodies would be sleeping as much as possible in the hopes of starting off at a fairly well-rested point with a little one who will be awakening multiple times at night for an undetermined length of time.  Perhaps the idea is to train up?