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Menstrual Calendar, Charting Your Signs of Fertility: Part 3

Menstrual Calendar, Charting Your Signs of Fertility: Part 3

In Part Two of this three-part series we covered basal body temperature and today we will cover your charting or graphing your temperature. Thank you for joining me for this series. If you enjoyed it, let me know and we can create more of them in the future!

Article by: Marie Zenack

Your Temperature Graph

Put a dot on a graph on the spot corresponding to each day’s temperature. Join the dots of consecutive days. If you do not take your temperature one day, do not join the dots across that day. Also write out the temperature numerically, to guard against errors in graphing.

Interpreting Your Chart

Breathe and relax. Study your chart.

2) Can you find six low temperatures during the fertile mucus days of your cycle?

3) Draw a horizontal line at the highest of the six low temperatures. This is your low temperature line.

4) Draw another horizontal line four-tenths of a degree F. or two-tenths of a degree C. above your low temperature line. This is your full thermal shift line.

5) Can you find three high temperatures after the low temperatures? All of the high temperatures must be above the low temperature line. At least the third high temperature must be at or above the full thermal shift line.

6) This temperature pattern of low and high temperatures is called a biphasic pattern with a full thermal shift. A biphasic pattern with a full thermal shift confirms that you really did ovulate. A smaller, but sustained temperature rise also probably indicates ovulation.

If you are hoping to become pregnant, please pay close attention to nutrition. Look for unprocessed foods grown without chemicals. Exercise in moderation. Get plenty of rest. Avoid stress. Think happy thoughts. Pray for the child you desire, and begin sending your child love, now. Heal any hurtful feelings between you and your mate, and between you both and your parents. Your mate should avoid hot shower or baths and tight clothing, both of which lower sperm count. To increase your chances of conception, use the wet, slippery days for sexual relations.

If you have observed a biphasic pattern with a full thermal shift, and it is now 18 days since your last slippery, wet day, and menstruation has not arrived, you may feel confident that you have conceived.

Congratulations and blessings!

Complete Series
Part 1: Cervical Mucous
Part 2: Basal Body Temperature
Part 3: Charting

About The Author

Marie Zenack is a teacher of fertility awareness and a facilitator of women’s rites of passage at Earth Wisdom, Natural Family Planning and Fertility Awareness.

Dr. Christine Traxler M.D., OB/GYN
Dr. Christine Traxler M.D., OB/GYN

Dr. Traxler is a University-trained obstetrician/gynecologist, working with patients in Minnesota for over 20 years. She is a professional medical writer; having authored multiple books on pregnancy and childbirth; textbooks and coursework for medical students and other healthcare providers; and has written over 1000 articles on medical, health, and wellness topics.  Dr. Traxler attended the University of Minnesota College of Biological Sciences and University of Minnesota Medical School,  earning a degree in biochemistry with summa cum laude honors in 1981,  and receiving her Medical Doctorate degree (MD) in 1986.

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  1. Avatar

    Thank you for this insightful article. My question is – Is it only on your wet days that you should make love to your partner? What happens if you make love before or after then? Does it in any way affect your chances of getting pregnant.

    • Elizabeth Willett, MA, CH

      Dear Ilanye,

      Cervical mucus which appears as wetness down there 😉 changes throughout the menstrual cycle. When a woman is about to ovulate there should be an increase in cervical mucus, as well as a change in the mucus texture, from “wet” to a more pliable, stretchy, egg-white like mucus.

      Each woman has what is called a Fertile Window, a three day time frame, in which she may be able to conceive if conditions are right. These days are the two days before and the day of ovulation. Some sources count a fourth day, the day after ovulation, as part of this fertile window as well. These are the days when fertile cervical mucus (the egg-white, stretchy mucus) should be present and one should consider trying to conceive.

      The reason the Fertile window is three days is because sperm can live, many believe, up to 48 hours in the female reproductive system and an egg only lives 24 hours after it is ovulated.

      If you try to conceive well before or after the fertile window when there is infertile cervical mucus – cervical fluid that is thick and acidic and designed to prevent sperm from entering the vagina – conception is unlikely to occur.

      I hope this is helpful information.

  2. Update 2014 – We are back! We have been away for a while and we sure have missed all of your wonderful questions and thoughts on our articles. Moving forward, one of our staff herbalists will be here to respond to comments! We look forward to connecting with our readers once again!

  3. Avatar

    When charting… I ‘ve noticed the temperature shift and then either the second day or the third day after ovulation drops. It then later begins a slow rise up. Is this a sign that there might be an issue?

    • Hi Rossi,

      A single temperature point doesn’t usually carry much significance on its own as individual temperatures can be affected by so many factors, both hormonal and non-hormonal. What you are looking for are trends and patterns over time.

      If your temperature dips several times before your period is expected, then it could mean that you are not taking your temperature accurately (especially if you are not taking it at the same time) or that you did not really ovulate. *

      To me it sounds like we need more information on if this is a pattern every month or if this just happened one time, which means the temp that day was off.


      All the best,


  4. Avatar

    You mention that our mate should avoid hot shower to avoid low sperm. How about us that wanting to get pregnant? Can we take hot shower? Thanks.

    • Dalene

      Hi Lee,

      Women taking a hot shower are not affected in the same way as men. Because mens reproductive organs are on the outside of their body temperatures affect them more.

      Have a good day,


  5. Avatar

    hi! this information is good , especially those who wants to get pregnant. I’m now 37 but still trying to have a baby. my cycle is regular. every 28days . I have tried to concieve but still we failed. I had undergo series of check-up , as well as my husband and every is Normal except that my uterus is retroverted. Please help us. I need to know when will be the best time that I’m fertile. Thanks!

  6. Avatar

    hi! thank you for your informative site. Can I ask a question? like in my case my last menstrual date was June 18, 2008, what is my exact fertile date? by the way my menstruation is regular. please help me! thank you