Information which can be gained from the sympto-thermal chart
A fertility chart is a diagnostic aid, giving information concerning
normal or abnormal function of the menstrual cycle, which is of use
to Doctors or Nurses in General Practice, Family Planning Clinics
and in Fertility Clinics
For the normal fertile woman:
(This is the basis of the sympto-thermal method of natural family planning )
- A Bi-phasic Sympto-thermal Chart confirms ovulation which
occurs approximately 24-48 hours before the temperature rise.
- It identifies the fertile phase when sexual intercourse can
lead to conception.
- It identifies the infertile phases when intercourse will not
lead to conception.
More - Sympto-thermal chart for the normal fertile woman
For the woman experiencing fertility problems :
- A Monophasic Chart shows that there has been no ovulation in this cycle
- The short cycle showing early ovulation, or the long cycle showing late
ovulation, may highlight the mis-timing of intercourse.
This commonly occurs to women who have been told that they should have
intercourse on the 14th day or mid-cycle.
- The short luteal phase is significant - Fertilisation may occur but
implantation is not completed if the luteal phase is less than eight days.
- The mucus symptom indicates the days of maximum fertility. These
days occur immediately prior to ovulation and before the temperature shift.
- Changes in the cervix can confirm the days of maximum fertility.
This is of particular value when mucus secretion is scanty, as may occur
in women over the age of 35 years and others who have recently stopped
- Charting a cycle is of great assistance in the accurate timing of diagnostic tests.
- A ‘Day 21 Progesterone’ must be carried out some days after ovulation
regardless of the day of cycle.
Similarly a ‘Sperm-Mucus Compatibility Test’ must be carried out
prior to ovulation regardless of the day of cycle.
More - Sympto-thermal chart for the woman experiencing fertility problems
For the woman with cyclic problems
More - Sympto-thermal chart for the woman with cyclic problems
For the breast-feeding mother:
- Returning fertility during reduced suckling or weaning.
- The interface between Lactational Amenorrhoea Method (LAM) and NFP.
More - Sympto-thermal chart for the breast-feeding mother
For the woman in the Pre-menopause years:
- Declining fertility and symptoms of the pre-menopause can
be monitored on the chart.
- Monophasic temperature charts (anovulatory cycles), give reassurance
that delayed periods are not due to pregnancy.
More - Sympto-thermal chart for the woman in the Pre-menopause years