Link to  Springfield, Illinois  Diocese on Natural Family Planning:


P.O. Box 2392, Orange Grove, TX  78372, (361) 384-0067,

Link to  Natural Family Planning International:


          NFP – International - December 2019 Newsletter

Subject: NFP and the Temperature Sign

The temperature sign is simple to use and a great option for couples.  As one couple told us recently (October 2019), “Pre-pregnancy, my husband and I primarily relied upon the thermal method, due to its simplicity.”

In the 1970s, my husband attended Fr. Paul Marx’s conferences on natural family planning and heard Dr. John Billings say he dropped the temperature because women found the temperature sign so easy to use that they tended to ignore the mucus sign.

In our Home Study Course, student couples have a pregnancy chart to interpret.  We want them to learn that three weeks of elevated temps indicate pregnancy.  When they give the right answer—the chart indicates pregnancy—I tell them that we picked the pregnancy chart for a reason.  This chart is to teach you that the temperature sign is an excellent indicator of pregnancy and also of the age of the unborn baby.  Our primary medical consultant called 3 weeks of elevated temps the best indicator for the estimated date of childbirth.  You do not have to buy pregnancy kits or age-of-unborn-baby kits.  The chart gives you the answer.  See page 70 in the NFPI manual for the details.

In addition, the temperature sign can also tell you when you are not pregnant.  For example, when a very worried woman called about a possible pregnancy while using only the mucus sign, we told her to take her temperature for five days and get back to us.  From those temps, we could assure her she was most likely not pregnant, assuming that her temperature pattern was in the range typical for most women.  This gave her peace of mind, and her subsequent menstruation confirmed our estimation.

For more information and research on the temperature sign, go to “Your Right to Know” on the home page or to

Sheila Kippley co-founder, NFPI

Here’s an announcement for your bulletin:

"NATURAL FAMILY PLANNING BUILDS STRONG FAMILIES. It is medically safe, morally acceptable, and highly effective. Build intimacy and increase communication in your marriage. Share the responsibility for birth regulation. NFP is inexpensive and reversible. Learn well at your own speed with the Home Study Course by NFP International at"