it's great, but don't expect a british GP to be interested in your temperature charts, they'll ignore you and go by your LMP anyway. by temp charting, soph was on time. by LMP she was 2 weeks early.
whatever. The point is, it's great not only for charting to get pregnant, but also aparently to prevent one of these:

never used it for that though, jim got himself neutered after soph's birth.
anyway, fab book.[/u]