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How to Know My Luteal Phase

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The luteal phase of a woman’s reproductive cycle is the period of time between ovulation and the start of the next menstrual period. Fertilized eggs implant in the uterus during this phase.

If a woman’s luteal phase is too short (less than 10 days) an egg may be unable to implant, and she may have a difficult time becoming pregnant. If you are trying to get pregnant, it will be helpful for you to know the length of your luteal phase.

You should be aware of the length of your luteal phase each month, because it will change from cycle to cycle.

 

Things You’ll Need

  • Basal thermometer
  • Fertility chart

 

Chart Your Basal Body Temperature

Luteal Phase

1. Purchase a basal thermometer.

Your basal temperature is your body temperature when you first wake up in the morning, before you even get out of bed. A basal thermometer will measure your temperature to the tenth, or even one hundredth of a degree.

Regular thermometers measure whole degrees, so your basal temperature won’t be as accurate with a regular thermometer.

 

2. Take your temperature when you wake up in the morning, starting on the first day of your menstrual period.

Your basal body temperature should be taken before you even get out of bed, and you should check it at the same time each morning. Your temperature will be most accurate if you have had at least three hours of uninterrupted sleep before waking up. Lie still as you take your temperature, so that you can get as accurate a reading as possible.

 

3. Record your temperature daily on your fertility chart.

You can keep track of your temperature on a paper chart or through an online charting service such as Fertility Friend.

 

Pinpoint Ovulation

1. Look for drops in temperature.

Your temperature will fluctuate from day to day, but a sharp drop in temperature can signal that ovulation is about to occur.

 

2. Note any spikes in temperature you see on your chart.

If your temperature remains elevated for at least three days, you may have ovulated the day before the temperature spike occurred.

 

3. Count the days between ovulation and the start of your next menstrual period.

This is your luteal phase. If your cycle is short, or you ovulate late in your cycle, the phase may be shorter than 10 days. If this occurs consistently throughout your cycles, you should ask your doctor about Luteal Phase Defect.

 

4. Start a new chart on the day your menstrual period begins.

This is the first full day of blood flow. The first day of your period marks the beginning of a new cycle.

 

Get Pregnant a Month

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