My wife and I are going over all of our past charts and now that we want to be more conservative are trying to figure out how we want ot treat the end of Phase I. She has mentruation usually into day 6, and her shortest cycle has been 26 days, so the 21/20 rule would put us at day 6. We have noticed from all of our past charts (8 very good charts, some others that aren’t perfect) that usually we have had relations into day 9 and have been safe.
So we are thinking of creating our own day 8 rule in which Phase II automatically begins on day 9 (granted as long as she is dry). Does this sound reasonable? We have no indication that we are super fertile and aren’t so worried about phase I, but still want to be pretty conservative. I am just wondering how creating your own rules in Phase I is looked upon.
Thanks! God Bless!