I've thought this through very carefully.
First I do the temperature charting thing so that I know when I'm ov. (Around once every 3 months at the moment, fgs)
Then we bd for 10 days around ov at least every other day (dh bravely agrees to bd every day when I get impatient/nervous around cd 14 and fear that we'll miss the moment)
And finally - and this is what's really going to clinch it, absolutely no doubt - I completely refuse to be premenstrual. Won't even contemplate swearing at dh under my breath (poor lamb does bear the brunt).
Pg announcement any day now. and and