Natural family planning approaches: cycle tracking, basal body temperature measurement, cervical mucus observation, and symptothermal synthesis

Natural methods of contraception, although now supported by modern methods of pregnancy prevention, still have a host of supporters. Contraception in accordance with nature is based on non-compliance on fertile days, which are determined based on various parameters and observations, assuming that this is the time when pregnancy is most likely to occur. Natural methods do not require invasive measures, which is very important for many people and is a plus to natural methods of prevention of pregnancy.

The calendar method is based on the assumption that a woman should abstain from sexual intercourse on the fertile days in order to prevent pregnancy. The basis for determining the period when the child is most likely to conceive is the fact that ovulation occurs 14 days before menstrual bleeding +/- 2 days, and the sperm can survive up to 72 hours after intercource. However, the ovum cell after ovulation is capable of surviving up to about 24 hours.

The thermal method is based on observing changes in body temperature during the duration of the menstrual cycle, which is stimulated to increase by the progesterone produced in phase II of the cycle. On the fertile days (ovulation) the body temperature can also increase over 3 days compared to the previous days. This method is quite problematic because it requires careful, daily measurement of body temperature at the same time (immediately after ovulation) and under these conditions, the temperature can be measured in a precise manner.

Another method of natural contraception, which is also based on daily observation, however, in this case the characteristics of cervical mucus produced by the cervix glands are important. During the next few days of the menstrual cycle, the consistency of the mucus changes, and observing these changes may lead to the determination of fertility days.

The manifestation-thermal method is the concentration of the above methods into one, which involves both measuring and observing changes in body temperature, determining fetal days using a calendar method, and closely observing the changes in the consistency and appearance of the cervical mucosa. Like the previous methods, it involves abstaining from intercourse during the period specified by the methods in question as a fetal one. Combining the three methods into a single method will lead to a greater confidence in this method of preventing pregnancy, and as with each individual method, the self-observation of changes occurring on the following days of the menstrual cycle itself, should be done daily with the help of pregnancy alone.