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5 Major Types of Basal Body Temperature Charts

Anovulation bmt charts

If you have been trying to conceive with no big luck, don’t be in a hurry to jump to doubtful conclusions about your infertility. Basal body temperature charts will offer you more reliable information. Now that you have made your first BBT charts, you are certainly impatient to know their interpretation. Actually, you are going to get professional estimation of your condition only from a gynecologist, however, while you are waiting for your appointment, we’ll provide you with valuable information on 5 major types of basal body temperature charts, presented in classic obstetrics and gynecology health guides.

Type #1: Normal Two-Phase BBT Chart

Such charts are typical for the normal two-phase menstrual cycle and are characterized by pre- ovulation and pre-menstrual falls of temperature along with a rise in the 2nd phase of the cycle by at least 0,4 Celsius. The duration of the post ovulation rise is between 12 and 14 days. Here is an example of a typical curve for the normal two-phase BBT chart:

    Basal temperature chart

Type #2: Estrogen-Progesterone Deficiency

The rise of the temperature in the second phase is slight. The difference between the 1st and the 2nd phase is no more than 0,2-0,3 Celsius. If you’ve got a chart like this, you may deal with estrogen-progesterone deficiency. When your charts repeat the mentioned pattern from cycle to cycle, your gynecologist will suspect hormonal disorders, leading to infertility.

Anovulation bbt chart

Type #3: Insufficiency of the 2nd Phase

This pattern is more associated with a threat of miscarriage than with infertility. In other words, pregnancy is possible yet is initially risky. How does the curve look? Basal temperature begins to rise only shortly before menstruation, while any pre-menstrual temperature fall is absent. The 2nd phase lasts less than 10 days. If a chart like this repeats at least 3 months in a row, you should consult your gynecologist.

Anovulatory bbt chart example

Anovulation basal body temperature chart

Type #4: Anovulatory

Normally a healthy woman may have on average one anovulatory cycle during a year, when ovulation doesn’t occur. However, if the situation repeats from cycle to cycle, a woman is not able to get pregnant since pregnancy can’t happen without ovulation. Anovulatory curve looks without any prominent temperature rises throughout the cycle. If you have the following monotonous pattern 3 months in a row, you should visit your doctor.

Temperature rise in anovulatory cycle

Type #5: Estrogen Deficiency

Unlike the previous type, in this case your temperature curve turns out to be too chaotic. The fluctuations don’t fit into any type, described above. As a rule, such a pattern is caused by a pronounced estrogen deficiency, however, occasional factors may also be among the culprits.

Anovulation basal body temperature chart

So, analyzing your chart curves, you may get some clues of your condition. Your own basal body temperature chart may be the 1st indicator of possible problems with a difficulty to get pregnant or infertility, however, this is not a diagnosis yet. Women with irregular cycle lengths (28-34 days), for instance, may ovulate not exactly in the middle of the cycle – on the 14th day, but somewhere between 14th and 20th day which is the norm.

Before coming to any conclusions, making a professional diagnosis and prescribing treatment, your doctor will need hormone test results and ultrasound examination. That’s why even if you’ve got an unfavorable temperature pattern, set your worries aside and make an appointment with a good specialist.