Ovulation - a process that takes place in the body of healthy women, which is associated with the release of the egg in the fallopian tube for later fertilization.Knowledge of the date of the start of ovulation can help plan a pregnancy or prevent unwanted conception.There are several ways to define it, but the most affordable and simple is the measurement of basal body temperature.
What is it?
basal body temperature (BBT) - a measure which is measured in a state of complete rest, in the anus, immediately after morning awakening.It is a reflection of hormonal women, and identifies problems in the sexual glands.However, most often used to determine BBT days favorable for conception.
Many gynecologists advise women to keep their schedule of basal temperature.Particularly those planning to replenish the family.Schedule basal body temperature at ovulation has its own characteristics.It allows you to calculate the most appropriate day to get pregnant.Basal body temperature depends on the hormonal processes in the body of a woman.
menstrual cycle and its phases
female body is designed for procreation, so all the processes occurring in it, are aimed at ensuring the conception and preparation of the body for pregnancy and childbirth.The menstrual cycle consists of three successive phases: it is the follicular, ovulatory and luteal.
first phase starts with menstrual bleeding, then there is a formation of the follicle in the ovary and the formation of a new endometrium.Its duration may suggest basal body temperature chart.Normal its duration - 1-3 weeks.In this phase, play the role fillikulostimuliruyuschy hormone and estrogen.She completed the maturation of the follicle.
second phase - is directly ovulation.The walls of the follicle ruptures and the egg passes through the fallopian tube to meet sperm.Phase lasts about 2 days.If fertilization occurs, the embryo attaches to the endometrium - if not, the egg dies.In the normal basal temperature chart on the day of ovulation is at its lowest level for the whole cycle.
In the third phase begins production of progesterone.It is produced by the corpus luteum, which is formed in situ ruptured follicle.Basal body temperature after ovulation is changed in a big way - by 0,4-0,6 ° C.During this period, the female body is preparing for nurturing and preserving fruit.If conception has not occurred, the concentration of female sex hormones is reduced, and the circle is closed, the follicular phase begins.Its duration is normal in all women is about 2 weeks.Why
temperature fluctuations occur?
measurement of basal body temperature during ovulation as a method of characterizing the hormonal changes in a woman's body, was proposed in 1953 by Marshall scholar.Now approved by the WHO as an official method for detecting fertility.Its basis is a natural change in the concentration of progesterone in the blood.This hormone acts on the thermoregulatory center in the brain, which causes a local temperature rise in the organs and tissues of the pelvis.It is because the sharp temperature rise in the anal division occurs in the luteal phase.
Thus, ovulation menstrual cycle divides into two parts: first, the average temperature is about 36.6-36.8 ° C.Then it is lowered by 0,2-0,3 ° C for 2 days and then rises to 37-37,3 ° and kept at this level until almost the end of the cycle.The normal schedule of basal temperature at ovulation called biphasic.
Measuring BBT can help determine with high accuracy the day, good for conception.According to statistics, it is known that the largest fall on the probability of getting pregnant day before and after the temperature - at 30%.2 days before the shock - 21%, two days after - 15%.Pregnancy can come with a 2% chance if fertilization takes place in 3 or 4 days before the temperature rise.
Why use this method if
be permanent schedule of basal temperature, the norm and pathology begins to literally be traced through 2-3 cycles.These curves can give an answer to many questions.Therefore, gynecologists strongly recommend this method to solve the following problems:
- certain favorable day for conception.
- Early diagnosis of pregnancy.
- As a method of contraception.
- Identify problems in the sexual glands.
mainly basal temperature is measured to calculate the first day of the ovulatory phase of the cycle.This is the easiest and cheapest way.To determine ovulation by basal temperature is very easy, if you regularly take measurements and observe all rules.
Correct measurement - the key to the effectiveness of the method
to the results of the method were true, you must comply with all instructions in the measurement of BBT, it is very important to schedule a basal body temperature during ovulation include only accurate and reliable data.There is a set of basic rules:
- temperature measurement is carried out every day at the same time (optimally - 7.00-7.30) in the rectum.
- Before the procedure you need to sleep at least 3 hours.
- If a woman needed to get out of bed before the time of measurement, the readings must be removed prior to the vertical position.
- thermometer, you must first prepare and put next to the bed.Shake it better before bedtime.
- Measure the temperature can be in a horizontal position, lying motionless on his side.
- during the cycle can not be changed thermometer.
- Making a testimony to the schedule better immediately after the measurement.
suitable for measuring both digital and mercury thermometer.But infrared thermometer for this method is absolutely not, t. To. Has a greater probability of error in the results.Since the basal temperature before ovulation and the day of initiation differ by only 0,2-0,3 ° C, a thermometer can not show this difference.Electronic thermometer gives large errors if you do not adhere to the instructions for its use.The most accurate figures can be obtained using a mercury thermometer, but it requires special care in handling.
When the figures obtained may be incorrect
It must be remembered that the basal temperature during ovulation, the rate of which is individual for each woman can vary depending on the influence of various factors.Often the external effects on the body leads to the fact that the figures are distorted and heavily armored vehicles have no informative value.These factors include:
- Flights, transfers, business trips.
- Stress.
- Excessive alcohol intake.
- taking psychotropic medications and hormonal.
- inflammatory processes in the body, fever.
- increased physical activity.
- The short sleep.
- Failure to follow instructions on the measurement.
- sex act a few hours before the measurement.
If something happened in the list above, then you should not trust the measurements.And the day that it was a violation, can not be ignored in the construction schedule.
How to build a graph of basal temperature
To plot basal temperature, you need to measure every day and make entries in a dedicated notebook.The graph represents the intersection of two lines at right angles.The vertical axis contains the temperature data, such as 35.7 to 37.3 ° C, and are arranged on a horizontal menstrual cycle.Each cell corresponds to 0.1 ° C and 1 day.Performing the measurement, you must find the day of the cycle on the chart, hold mentally line up and put an end opposite the desired temperature.At the end of the cycle all the points of the graph are connected, the resulting curve is an objective reflection of hormonal changes in the female body.
The schedule should indicate the date and build a graph for special notes.Data to be sufficiently complete, you can describe your state of health, manifested symptoms or situations that might appear on the change in basal body temperature.
If a woman is not very clear as to make the schedule of basal temperature, the gynecologist of female consultation is required to explain how to do it and help decipher the data.
Now there are many programs that can help you create an electronic chart, which will be always at hand.In this case, the woman simply need to enter the measured temperature.Anything else will make the program.
Decoding graphics
This method of determining fertility is important not only to build, but the transcript of basal body temperature charts.The rate for each individual woman.However, there is an approximate view of the schedule, which must happen if the sexual glands are working properly.For the analysis of the curve to build the following elements: the overlapping line, the line of ovulation, the duration of the second phase.
overlap (average) line is plotted on top of the 6 points of the follicular cycle, excluding the first 5 days and days when performance deviates strongly due to external factors.This item does not carry meaning.But necessary for clarity.
basal body temperature on the day of ovulation is reduced, so to determine the date for a successful conception, it is necessary to find consecutive points that are under the overlying line.When this temperature value 2 of 3 points should not differ by less than 0.1 ° C from the centerline, and at least one of them must have a difference of 0.2 ° C with it.The next day, after that you can watch the jump point upwards by 0.3-0.4 degrees.At this point, and it is necessary to build a line of ovulation.If you have difficulty with this method, you can use the rule "finger" to plot.For this it is necessary to exclude all the points that differ by 0.2 degrees from the previous or next parameter.And on the basis of the resulting graph to build a line of ovulation.
basal body temperature after ovulation in the anus should stay at the level of above 37 ° C for 2 weeks.Deviations duration of the second phase of the jump in temperature or small talk about the violations of the ovaries or the low productivity of the corpus luteum.If 2 consecutive cycle duration of the second phase is not more than 10 days, you should consult a gynecologist, because it is the main sign of failure of the luteal phase progesterone.
schedule of basal temperature during ovulation must also conform to the norm on such parameters as temperature difference between the follicular and luteal phases.This figure must be equal to more than 0.4 ° C.
How does the schedule if there is ovulation and pathological
normal ovulatory schedule consists of two phases.The first one can observe the average temperature of 36.5-36.8 ° C for 1-3 weeks, then drop by 0,2-0,3 ° C, and a sharp rise up to 37 ° C and above.In this second part of the graph should be not shorter than 12-16 days, but before bleeding is observed a slight decrease in temperature.Graphically, it looks like this:
should also give examples of graphs of basal temperature, which can be traced pathology.The curve in this case will be different from the norm on various grounds.If there is a deficiency of estrogen-progesterone, the temperature jump is not more 0,2-0,3 ° C.This state is fraught with infertility, and therefore requires treatment to specialists.
If the second phase on the graph is shorter than 10 days, it is a clear sign of progesterone deficiency.Normally this is no decrease in temperature before coming menstrual bleeding.In this case, the pregnancy possible but threatened interruption.
If a woman's body there is a lack of estrogen, the schedule will be chaotic, strikingly different from the norm.It may also be due to the influence of external factors (hops, excessive alcohol intake, inflammation and so on. D.).
When the curve has no spike in temperature and a monotonous schedule, it is called an anovulatory cycle.This happens in healthy women, but not more than 1-2 times a year.If this is repeated from cycle to cycle, it may be an indication of sterility.
If after the second phase there is no reduction in temperature, it is likely a woman is pregnant.
Explanation basal body temperature charts, examples of which are presented above require specialist knowledge.So do not make their own conclusions, to put a diagnosis and prescribe treatment.
Advantages and disadvantages of the method
Advantages of this method is its absolute availability, simplicity and the absence of costs.When the schedule of basal temperature during ovulation leads a woman regularly, it makes it possible to determine the days of ovulation, the time to recognize early pregnancy or to detect hormonal abnormalities and consult a physician-gynecologist.
However, cons in the method are also available.This method is not very accurate due to the individual characteristics of each organism.Here are its main disadvantages:
- makes it impossible to predict when it's ovulatory phase.
- not give precise information about when she was ovulating.
- not be guaranteed even in the presence of a normal two-phase schedule that ovulation was indeed.
- can not give specific information about the quantity of progesterone in the blood.
- not provide data on the normal functioning of the corpus luteum.
To know exactly how informative method, it is necessary in the first couple of cycles of blood tests to make female hormones and ultrasound.If the plot data and research coincide, so a woman can easily lead a graph of basal temperature.Norm and deviation displayed on the curve in this case will correspond to reality.
This method is convenient, simple and requires no financial cost.If accurately perform all the rules and know how to decipher the schedule of basal temperature, then figure out the day of ovulation and conception plan is very easy.However, if there is any deviation from the norm is to see a specialist in order to prevent the development of pathological processes.
