MoonDragon's Pregnancy Information
OVULATION TEMPERATURE CHANGES
Just prior to ovulation, when your estrogen level has reached its peak, a drop in your basal body temperature will occur. However, following ovulation, there is a rise in your body temperature. When the temperature remains elevated for three days, ovulation is thought to have occurred.
BASAL BODY TEMPERATURE
Basal body temperature is the lowest temperature attained by the body during rest (usually during sleep). It is generally measured immediately after awakening and before any physical activity has been undertaken, although the temperature measured at that time is somewhat higher than the true basal body temperature. In women, ovulation causes an increase of one-half to one degree Fahrenheit (one-quarter to one-half degree Celsius) in basal body temperature (BBT); monitoring of BBTs is one way of estimating the day of ovulation. The tendency of a woman to have lower temperatures before ovulation, and higher temperatures afterwards, is known as a biphasic pattern. Charting of this pattern may be used as a component of fertility awareness.
HORMONAL CAUSES OF BIPHASIC PATTERNS
The higher levels of estrogen present during the pre-ovulatory (follicular) phase of the menstrual cycle lower BBTs. The higher levels of progesterone released by the corpus luteum after ovulation raise BBTs. The rise in temperatures can most commonly be seen the day after ovulation, but this varies and BBTs can only be used to estimate ovulation within a three day range.
If pregnancy does not occur, the disintegration of the corpus luteum causes a drop in BBTs that roughly coincides with the onset of the next menstruation. If pregnancy does occur, the corpus luteum continues to function (and maintain high BBTs) for the first trimester of the pregnancy. After the first trimester, the woman's body temperature drops to her pre-ovulatory normal as the placenta takes over functions previously performed by the corpus luteum.
Very rarely, the corpus luteum may form a cyst. A corpus luteum cyst will cause BBTs to stay elevated and prevent menstruation from occurring until it resolves, which could take weeks or months.
Taking your basal body temperature has to do with predicting ovulation (and then deciding whether or not to have intercourse) not with predicting pregnancy. Pregnancy may or may not occur, depending on which day you had intercourse this month.
CONCEPTION - TRYING TO CONCEIVE
Regular menstrual cycles are often taken as evidence that a woman is ovulating normally, and irregular cycles is evidence she is not. However, many women with irregular cycles do ovulate normally, and some with regular cycles are actually annovulatory or have a luteal phase defect. Records of basal body temperatures can be used to accurately determine if a woman is ovulating, and if the length of the post-ovulatory (luteal) phase of her menstrual cycle is sufficient to sustain a pregnancy.
Pregnancy tests are not accurate until 1 to 2 weeks after ovulation. Knowing an estimated date of ovulation can prevent a woman from getting false negative results due to testing too early. Also, 18 consecutive days of elevated temperatures means a woman is almost certainly pregnant.
Tracking basal body temperatures are a more accurate method of estimating gestational age than tracking menstrual periods.
CONTRACEPTION - TRYING TO AVOID PREGNANCY
Charting of basal body temperatures is used in some methods of fertility awareness, and may be used to determine the onset of post-ovulatory infertility. However, BBTs only show when ovulation has occurred; they do not predict ovulation. Normal sperm life is up to five days, making prediction of ovulation several days in advance necessary for avoiding pregnancy. BBT-only methods often use a rule similar to that of calendar-based methods to determine the beginning of the pre-ovulatory fertile phase.
USING A BASAL THERMOMETER
Glass fever thermometers typically have markings every 0.2°F (0.1°C). Basal thermometers require accuracy of at least 0.1°F (0.05°C), so special glass basal thermometers are sold separately from glass fever thermometers. All digital thermometers generally read to at least 0.1°F (0.05°C) and so are suitable for monitoring basal temperatures. Some digital thermometers are marketed as "basal thermometers" and have extra features such as a larger display, expanded memory functions, or beeping to confirm the thermometer is placed properly. Some fertility monitors determine the fertile and infertile portions of the menstrual cycle by interpreting basal body temperature records.
QUALITY SUPPLIES & PRODUCTS
BASAL THERMOMETERS PRODUCTS
Amazon: Basal Thermometer Products
FERTILITY MONITORS PRODUCTS
Amazon: Fertility Monitor Products
OVULATION MICROSCOPE (FOR TESTING CERVICAL MUCUS) PRODUCTS
Amazon: Ovulation Microscope Products
OVULATION TEST PRODUCTS
Amazon: One Step Ovulation Test Products
Amazon: Ovulation Test Products
HELPFUL CONCEPTION-RELATED LINKS
MoonDragon's Contraception Information: Fertility Basics
MoonDragon's Contraception Information: Mucus Observation
MoonDragon's Contraception Information: Natural Family Planning
MoonDragon's Pregnancy Information: Ovulation & Getting Pregnant
Sister Zeus: Using Your Basal Body Temp In Determining Risk of Pregnancy
MoonDragon's Pregnancy Information Index
MoonDragon's Pregnancy Information & Survival Tips
AROMATHERAPY: ESSENTIAL OILS DESCRIPTIONS & USES
Allspice Leaf Oil Angelica Oil Anise Oil Baobab Oil Basil Oil Bay Laurel Oil Bay Oil Benzoin Oil Bergamot Oil Black Pepper Oil Chamomile (German) Oil Cajuput Oil Calamus Oil Camphor (White) Oil Caraway Oil Cardamom Oil Carrot Seed Oil Catnip Oil Cedarwood Oil Chamomile Oil Cinnamon Oil Citronella Oil Clary-Sage Oil Clove Oil Coriander Oil Cypress Oil Dill Oil Eucalyptus Oil Fennel Oil Fir Needle Oil Frankincense Oil Geranium Oil German Chamomile Oil Ginger Oil Grapefruit Oil Helichrysum Oil Hyssop Oil Iris-Root Oil Jasmine Oil Juniper Oil Labdanum Oil Lavender Oil Lemon-Balm Oil Lemongrass Oil Lemon Oil Lime Oil Longleaf-Pine Oil Mandarin Oil Marjoram Oil Mimosa Oil Myrrh Oil Myrtle Oil Neroli Oil Niaouli Oil Nutmeg Oil Orange Oil Oregano Oil Palmarosa Oil Patchouli Oil Peppermint Oil Peru-Balsam Oil Petitgrain Oil Pine-Long Leaf Oil Pine-Needle Oil Pine-Swiss Oil Rosemary Oil Rose Oil Rosewood Oil Sage Oil Sandalwood Oil Savory Oil Spearmint Oil Spikenard Oil Swiss-Pine Oil Tangerine Oil Tea-Tree Oil Thyme Oil Vanilla Oil Verbena Oil Vetiver Oil Violet Oil White-Camphor Oil Yarrow Oil Ylang-Ylang Oil Aromatherapy
Healing Baths For Colds
Using Essential Oils
AROMATHERAPY: HERBAL & CARRIER OILS DESCRIPTIONS & USES
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NUTRITION BASICS ARTICLES
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RELATED MOONDRAGON HEALTH LINKS & INFORMATION
MoonDragon's Nutrition Information Index MoonDragon's Nutritional Therapy Index MoonDragon's Nutritional Analysis Index MoonDragon's Nutritional Diet Index MoonDragon's Nutritional Recipe Index MoonDragon's Nutrition Therapy: Preparing Produce for Juicing MoonDragon's Nutrition Information: Food Additives Index MoonDragon's Nutrition Information: Food Safety Links MoonDragon's Aromatherapy Index MoonDragon's Aromatherapy Articles MoonDragon's Aromatherapy For Back Pain MoonDragon's Aromatherapy For Labor & Birth MoonDragon's Aromatherapy Blending Chart MoonDragon's Aromatherapy Essential Oil Details MoonDragon's Aromatherapy Links MoonDragon's Aromatherapy For Miscarriage MoonDragon's Aromatherapy For Post Partum MoonDragon's Aromatherapy For Childbearing MoonDragon's Aromatherapy For Problems in Pregnancy & Birthing MoonDragon's Aromatherapy Chart of Essential Oils #1 MoonDragon's Aromatherapy Chart of Essential Oils #2 MoonDragon's Aromatherapy Tips MoonDragon's Aromatherapy Uses MoonDragon's Alternative Health Index MoonDragon's Alternative Health Information Overview MoonDragon's Alternative Health Therapy Index MoonDragon's Alternative Health: Touch & Movement Therapies Index MoonDragon's Alternative Health Therapy: Touch & Movement: Aromatherapy MoonDragon's Alternative Therapy: Touch & Movement - Massage Therapy MoonDragon's Alternative Health: Therapeutic Massage MoonDragon's Holistic Health Links Page 1 MoonDragon's Holistic Health Links Page 2 MoonDragon's Health & Wellness: Nutrition Basics Index MoonDragon's Health & Wellness: Therapy Index MoonDragon's Health & Wellness: Massage Therapy MoonDragon's Health & Wellness: Hydrotherapy MoonDragon's Health & Wellness: Pain Control Therapy MoonDragon's Health & Wellness: Relaxation Therapy MoonDragon's Health & Wellness: Steam Inhalation Therapy MoonDragon's Health & Wellness: Therapy - Herbal Oils Index
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