This method helps predict the fertile days in women with regular menstrual cycles. It works by tracking the length of the menstrual cycle over several months to predict the fertility window.
Ovulation is when one of the ovaries releases an egg in the middle of the menstrual cycle. The days leading up to ovulation and one day afterward are the fertility window. Generally, women who have a 28-day menstrual cycle ovulate around day 14. However, the length of cycles in women can vary from 21 to 35 days. An ovulation calendar can keep track of the menstrual cycle throughout the year and predict the fertility window.
To find the number of days in the menstrual cycle, the first day of the current period and the first day of the next period is marked. The days in between give the number of days in the menstrual cycle. A minimum of 6 cycles should be tracked to use the method successfully.
Example of an ovulation calendar with 7 cycles charted:
First Day of Period | Number of Days in Cycle |
January 20 | 29 |
February 18 | 29 |
March 18 | 29 |
April 16 | 29 |
May 12 | 26 |
June 9 | 28 |
July 9 | 30 |
To predict the first fertile day when the woman is likely to get pregnant, the number of days in the shortest cycle on the past record is taken (26). Subtract 18 from 26, and the resulting number is 8—Count 8 days from day 1 of the period. If the 4th day of the month is day 1, adding 8 days makes the 11th day of the month the first fertile day.
To predict the last fertile day of the cycle, subtract 11 from the total number of days of the longest cycle (29-11=19). Count 19 days starting from day 1 (4th of the month). The 22nd day of the month is the last fertile day.
It is important to remember that the calendar method doesn’t work if all the days in the cycle are shorter than 27 days. An Ovulation calendar online can also be used to keep track of the menstrual cycles and predict ovulation.
Signs of Ovulation
Ovulation symptoms can vary from woman to woman, and not all women may experience it. However, most women experience these general signs as they get closer to ovulation:
- Cervical mucus, a natural discharge from the vagina, varies in texture and colour throughout the month. Around the time of ovulation, the mucus is clear and slippery, resembling raw egg whites.
- Changes in the basal body temperature (BBT), which is your temperature when you’re fully at rest. For most women, the basal body temperature remains steady during other times. A spike can be seen in the BBT just before ovulation occurs.
- Changes to the cervix (tissue that connects the vagina and uterus). Through the month, the cervix changes all women. During ovulation, the position and firmness of the cervix can change. It can become soft, high, open and wet.
The ovulation calendar method can track the fertility window in women who have regular menstrual cycles that last for more than 27 days on average. Combined with the signs of ovulation, it is possible to predict ovulation during the fertility window.
Keywords :
Ovulation calendar
Ovulation calendar method
Ovulation calendar online
Tags :
Ovulation calendar
Menstrual Cycle
Ovulation symptoms
Cervix
Fertility
Periods
Ovulation signs
References:
https://americanpregnancy.org/resources/ovulation-calendar/
https://americanpregnancy.org/getting-pregnant/signs-of-ovulation-70953/
https://www.babycenter.com/getting-pregnant/ovulation/ovulation-calculator
https://www.babycentre.co.uk/ovulation-calculator
https://www.plannedparenthood.org/learn/birth-control/fertility-awareness/whats-calendar-method-fams
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5725625/
https://www.nhs.uk/common-health-questions/womens-health/how-can-i-tell-when-i-am-ovulating/
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