Between babies #1 and #2, we used NFP (Natural Family Planning) as our baby-spacing method. Right now, we are "technically" using NFP, but I'm not taking my temperature (which means that we're not really using NFP). Why? Well, I don't get up at the same time every day right now (too tired!), and I don't get the requisite four hours of straight sleep needed to get accurate temperatures.
However, here's something interesting! Every month, I get predictable "Mittelschmerz," also known as ovulation pain, cramps that occur mid-cycle cramping during ovulation (I'm assuming that it occurs during, and not before or after).
Assuming that mittelschmerz is the day before temperature rise, and that the next day would be the first day of temperature rise (the first day of the luteal cycle), I have been using Mittelschmerz to predict when my period will arrive. Since my luteal phase is 10-11 days long, I count off 10-11 days after Mittelschmerz, then mark the following two days as possible period days. For the past two months, I have been dead-on with a 10-day luteal phase.
Thus, if I experience mittelschmerz on March 1st, I would count off 10-11 days (that is, March 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and possibly 12) and predict that my period would start on March 12th or 13th.
It's worked! I'm interested to see if I can keep up the run of accurate predictions.
Any thoughts on this? And does anyone know if Mittelschmerz really does occur during ovulation (and not before or after, or all three?)
(Oh, and if anyone was wondering - Yes, I technically do have a "luteal phase defect," that is, a luteal phase that is "too short to support a pregnancy." However, we have never had any fertility problems (quite the reverse!). How that works I don't know!)