Scientific
Glossary.
A
Amenorrhea
Amenorrhea is the absence of menstruation. Primary amenorrhea refers to the failure to start menstruating by age 15, while secondary amenorrhea is the cessation of periods for at least three consecutive months in someone who previously menstruated. It can be a symptom of hormonal imbalances related to menopause or other conditions.
Androgens
Androgens represent a group of hormones, including testosterone and DHEA, that are often called "male hormones" but are vital for female health, supporting bone strength, libido, muscle mass, and cognitive function.
Aromatization
Aromatization is the enzymatic conversion of androgens (testosterone and androstenedione) into estrogens (estradiol and estrone), carried out by the aromatase enzyme. After menopause, this peripheral conversion — primarily in adipose tissue — becomes the body's main source of estrogen.
B
Brain Fog
"Brain fog" is a common term for the cognitive changes many women experience during menopause, including memory lapses, difficulty concentrating, and mental confusion. It is a biological reality driven by the brain's adaptation to declining estrogen.
Bone Density
Bone density refers to the amount of bone mineral in bone tissue. It is a key indicator of bone strength and is crucial for assessing the risk of osteoporosis and fractures. Estrogen plays a vital role in maintaining bone density.
Bioidentical Hormone Therapy
Bioidentical Hormone Therapy (BHT) refers to hormones that are chemically identical to those produced by the human body. These are usually derived from plants and are the modern standard for regulated hormone therapy prescriptions.
C
Cardio-metabolic Health
Cardio-metabolic health refers to the combined health of the cardiovascular system and the metabolic system, including factors like blood pressure, cholesterol, blood sugar levels, and body composition. Menopause significantly impacts these markers.
Cardiovascular Risk
Cardiovascular risk refers to the likelihood of developing heart and blood vessel diseases. For women, this risk increases significantly after menopause due to the loss of estrogen's protective effects on cholesterol, blood vessels, and metabolic function.
Compounded Bioidentical Hormones
Compounded bioidentical hormones are "custom-mixed" hormone preparations made by a compounding pharmacist. While they use bioidentical ingredients, they lack the rigorous safety, purity, and consistency testing required of FDA-approved regulated hormones.
E
Estrogen
Estrogen is a group of primary female sex hormones responsible for the development and regulation of the reproductive system. It also acts as a master regulator for many other systems, including the brain, heart, and bones, influencing everything from mood and cognitive function to artery elasticity and skeletal strength.
Estradiol
Estradiol (E2) is the most potent and prevalent form of estrogen produced by the ovaries during a woman's reproductive years. It plays a crucial role in regulating the menstrual cycle, maintaining bone density, cardiovascular health, and cognitive function.
Estrone
Estrone (E1) is one of the three primary forms of estrogen. It is often referred to as the "menopause estrogen" because it becomes the dominant form produced by the body after the ovaries cease their primary production of estradiol.
G
Genitourinary Syndrome of Menopause (GSM)
Genitourinary Syndrome of Menopause (GSM) refers to a collection of symptoms affecting the vulva, vagina, urethra, and bladder due to declining estrogen levels. It includes vaginal dryness, painful intercourse, and urinary issues.
GABA
GABA (gamma-aminobutyric acid) is the brain's primary inhibitory neurotransmitter, responsible for calming neural activity and supporting sleep, mood regulation, and anxiety control. Progesterone and its metabolite allopregnanolone act on GABA receptors, which is why declining progesterone in perimenopause is linked to insomnia and anxiety.
H
Hormone Therapy
Hormone Therapy (HT), also known as Hormone Replacement Therapy (HRT), is a medical treatment that supplements the body with estrogen (and often progesterone) to alleviate menopausal symptoms and prevent long-term health issues like bone loss.
Hot Flashes
A hot flash is a sudden sensation of heat, flushing, and sweating, primarily in the upper body, caused by the brain's exaggerated response to temperature changes as estrogen levels fluctuate.
Hypothalamus
The hypothalamus is a small region at the base of the brain that regulates body temperature, sleep, appetite, and the hormonal signals that control the menstrual cycle. Its disrupted thermoregulation is the direct cause of hot flashes and night sweats during the menopause transition.
Hormone Volatility
Hormone volatility describes the erratic, high-amplitude swings in estrogen and progesterone that characterize perimenopause. Rather than a smooth decline, hormone levels become unpredictable — sometimes spiking higher than premenopausal peaks before crashing — and these rapid changes, not low levels per se, drive most perimenopausal symptoms.
I
Insulin Resistance
Insulin resistance is a metabolic condition where cells become less responsive to the hormone insulin, leading to higher blood sugar levels. During menopause, the loss of estrogen can significantly increase the risk of developing this condition.
Inflammation
Inflammation is the body's immune response to injury or stress. In the context of menopause, declining estrogen levels can lead to a state of chronic, low-grade systemic inflammation often termed "inflammaging."
L
Luteinizing Hormone
Luteinizing Hormone (LH) is a gonadotropin released by the pituitary gland that triggers ovulation in women. In perimenopause, LH levels can become erratic as ovarian function declines, contributing to irregular cycles.
Libido
Libido refers to sexual desire — the spontaneous or responsive interest in sexual activity. During the menopause transition it is shaped by hormonal changes, genitourinary symptoms, sleep quality, mood, relationship context, and medications, making it a multifactorial rather than purely hormonal phenomenon.
M
Menopause
Menopause is the point in time marking 12 consecutive months without a menstrual period, signaling the permanent end of a woman's reproductive years. It is a retrospective diagnosis, occurring when the ovaries significantly decrease their production of estrogen and progesterone.
Menopause Transition
The menopause transition is the clinical term for the period of time during which a woman's body makes the natural transition to menopause, marking the end of the reproductive years. It encompasses the entire symptomatic and hormonal journey from early perimenopause to the final menstrual period.
Menopause Symptom Scale
The Menopause Symptom Scale (MSS), often referred to as the Menopause Rating Scale (MRS), is a standardized tool used by clinicians to assess the presence and severity of symptoms across physical, psychological, and urogenital categories.
Menopause Symptoms
Menopause symptoms are the physical and psychological disruptions that arise when the body adapts to a permanent decline in estrogen and progesterone. These symptoms can impact nearly every bodily system, from the brain and heart to the skin and urogenital tract.
Menstrual Cycle
The menstrual cycle is the monthly sequence of changes the body goes through to prepare for pregnancy, involving the brain, ovaries, and uterus. In perimenopause, changes to the length and flow of this cycle are the first clinical indicators of the transition.
O
Osteoporosis
Osteoporosis is a bone disease characterized by a significant decrease in bone density and quality, leading to fragile bones and an increased risk of fractures. It is a major health concern for postmenopausal women due to the decline in estrogen.
Ovarian Aging
Ovarian aging is the biological process of declining egg quantity and quality over time, ultimately leading to the cessation of ovulation and the permanent drop in sex hormone production known as menopause.
Ovulation
Ovulation is the monthly release of a mature egg from an ovarian follicle. It is the central event of the menstrual cycle and the primary trigger for the production of progesterone.
Ovarian Reserve
Ovarian reserve is the remaining quantity and quality of a woman's eggs at any given point in her reproductive life. It declines steadily from birth and accelerates after age 35, ultimately reaching the threshold at which the ovaries can no longer sustain regular ovulation — the biological basis of menopause.
P
Perimenopause
Perimenopause, or the menopause transition, is the multi-year period leading up to menopause. It is characterized by significant hormonal volatility and erratic menstrual cycles as ovarian function begins to decline. This phase often starts in a woman's 40s and can last for several years.
Progesterone
Progesterone is a steroid hormone produced by the ovaries after ovulation that regulates the menstrual cycle and prepares the uterus for pregnancy. It is also a neurosteroid with significant effects on sleep architecture, mood, and central nervous system stability.
Perimenopause Symptoms
Perimenopause symptoms are the wide-ranging physical and emotional changes that occur as the ovaries begin to transition toward menopause. These are primarily driven by erratic fluctuations in estrogen and falling levels of progesterone.
Palpitations
Heart palpitations are the sensation of a fast-beating, fluttering, or pounding heart. During perimenopause, these episodes are common and are typically related to the autonomic nervous system's response to fluctuating estrogen rather than a primary heart defect.
S
Surgical Menopause
Surgical menopause occurs when both ovaries are surgically removed (bilateral oophorectomy), causing an immediate and permanent stop to hormone production. This is different from natural menopause, which is a gradual process.
Sleep Disturbance
Sleep disturbance during menopause refers to regular difficulties in falling asleep, staying asleep, or waking too early. These disruptions are primarily driven by night sweats and the decline of progesterone, a hormone with natural sedative-like effects on the brain.
V
Vasomotor Symptoms
Vasomotor symptoms (VMS) are the cardinal symptoms of the menopause transition, primarily manifesting as hot flashes and night sweats. They are the result of a neurological hypersensitivity in the brain's thermoregulatory center triggered by fluctuating estrogen.
Vaginal Dryness
Vaginal dryness is a common menopausal symptom characterized by a lack of natural lubrication and a thinning of the vaginal walls. It is a direct result of declining estrogen levels, which normally keep these tissues hydrated, elastic, and acidic.
Visceral Fat
Visceral fat is the "hidden" fat stored deep inside the abdominal cavity, surrounding the internal organs. It is more metabolically active and inflammatory than the subcutaneous fat stored just under the skin.