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Intel Lab Diagnostics Dubai
Single Biomarker

Estradiol (E2)

Estrogen (E2)

Estradiol is the primary female sex hormone responsible for reproductive development and menstrual cycle regulation. Testing helps evaluate fertility, menstrual disorders, and menopause status.

BLOOD24 HOURSNO FASTING
AEDAED219
  • Free home collection
  • Physician-reviewed report

24 Hours

Turnaround

Blood

Sample

About This Test

What the Estradiol (E2) test tells you

Estradiol, written E2 on most reports, is the most biologically active form of oestrogen. In women of reproductive age nearly all of it comes from the follicles developing in the ovaries each month; smaller amounts are made by the adrenal glands and by fat tissue, and men produce a modest amount in the testes and by converting testosterone. Its effects reach well beyond reproduction: it thickens the lining of the uterus in preparation for a possible pregnancy, drives breast and reproductive development at puberty, helps maintain bone strength, and influences how the body handles cholesterol.

What sets estradiol apart from most blood tests is that there is no single expected value across a month. It climbs steadily as a follicle matures, peaks shortly before the egg is released, dips, then rises again more gently while the corpus luteum is active, and falls away if pregnancy does not occur. The same measurement can be entirely ordinary at one point in the cycle and clearly unusual at another, so a result only carries meaning when the day of the cycle is recorded alongside it. After menopause the ovarian supply stops and the level settles at a much lower baseline, which is expected rather than a deficiency.

Because of that pattern, estradiol is rarely read alone. Paired with FSH and LH it helps separate an ovary that is no longer responding from a pituitary gland that is no longer signalling. During fertility treatment it is measured repeatedly to follow how the follicles are answering stimulation, so the trend matters more than any single figure. In men and in children it answers different questions again: breast tissue development, puberty arriving unusually early, or a hormone-producing tumour that needs to be excluded. In every setting it is one input into a clinical picture, never a conclusion by itself.

Sample type
Blood
Measured in
pg/mL
Turnaround
24 Hours
Fasting
Not required
Best for
Adults planning a family
Why Get Tested?

Ordered to evaluate infertility, menstrual irregularities, menopausal symptoms, gynaecomastia in men, or to monitor IVF stimulation protocols.

  • Reading the menstrual cycle

    Estradiol rises and falls in a set pattern across the month. A sample taken on a named cycle day lets your doctor see whether the ovaries are moving through that pattern as expected.

  • Investigating difficulty conceiving

    Read together with FSH and LH, estradiol helps show whether follicles are developing and whether the signal reaching the ovaries from the pituitary is adequate.

  • Assessing the menopause transition

    When periods become irregular or stop, a low estradiol alongside a raised FSH supports declining ovarian function as the explanation rather than another cause.

  • Oestrogen effects in men

    Men make oestrogen by converting testosterone, mostly in fat tissue. Checking estradiol helps explain breast tissue enlargement, reduced libido or fertility difficulty.

When This Test Is Ordered

Reasons your doctor may request the Estradiol (E2) test

Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.

  • Periods & menopause

    • Periods that are irregular, unusually light, or have stopped altogether.
    • Hot flushes, night sweats or other symptoms suggesting the menopause transition.

  • Fertility & IVF

    • Difficulty conceiving, or an assessment before starting fertility treatment.
    • Monitoring how the ovaries respond during IVF or another stimulation cycle.

  • Puberty & hormonal changes in men

    • Puberty that appears to be starting unusually early, or that has not started.
    • Breast tissue enlargement in a man, or unexplained loss of libido and fertility.
Preparation
The short version
No prep needed.
  • Blood
  • Free home collection
  • No fasting
  • Results in 24 Hours
  1. 1
    Book any time

    No fasting window: pick any slot that suits you, online or on WhatsApp.

  2. 2
    We come to you

    A DHA-licensed nurse collects your sample at home or in the office: free home collection.

  3. 3
    Results in 24 Hours

    A physician-reviewed, easy-to-read report lands securely by WhatsApp and email.

Prep note
Physician reviewed

No fasting is needed, but timing is the part that matters.

If you still have periods, your doctor will usually ask for a specific day of the cycle, counted from the first day of bleeding: book the appointment accordingly and tell the team the date your last period started, because a result recorded without a cycle day is very hard to interpret. If your cycles are irregular or have stopped, or you are past menopause, this timing rule does not apply and your doctor will simply advise when to attend.

Mention any hormone therapy, contraceptive, fertility medication or oestrogen gel you use and when you last took it, since all of these change the result. If you take high-dose biotin supplements, ask whether to pause them for a few days beforehand.

Otherwise eat, drink and take your usual medicines as normal.

Understanding Your Results

Estradiol is read against the day of your cycle first. A result in the "Low" pg/mL band is expected in men, in children and after menopause; in menstruating women it may reflect a sample taken early in the cycle, or point to ovarian insufficiency, very low body weight, heavy training or raised prolactin. A "Normal" pg/mL result is cycle-dependent: the same figure can be typical at one point in the month and clearly low at another. A "High" pg/mL reading is most often the ordinary mid-cycle rise as a follicle matures, or fertility stimulation, pregnancy or oestrogen-containing medication; excess body fat is a common explanation in men. High-dose biotin can shift this assay in either direction, so compare results within one laboratory. Your doctor interprets the number alongside your cycle day, your symptoms, your medication and hormones such as FSH and LH.

SmartReport
14350
Healthy zone183pg/mLNormal
Reference ranges · pg/mL
Low
Low: interpret with cycle phase and sex.
0–14
Normal
Within a typical range (cycle-dependent).
15–350
High
Elevated: interpret with cycle phase and clinical context.
351–1000

Ranges are a guide: your physician interprets your result alongside your symptoms and history.

Reading a High or Low Result

  • What a higher result can point to

    • The ordinary mid-cycle rise as a dominant follicle matures: the commonest reason for a high reading, and not a problem in itself.
    • Ovarian stimulation during fertility treatment, where several follicles produce oestrogen at the same time.
    • Pregnancy, in which the placenta becomes a substantial source of oestrogen.
    • Oestrogen-containing medication, including menopausal hormone therapy, some contraceptives, and oestrogen gels or creams.
    • Excess body fat, which converts androgens into oestrogen and is a common explanation for a raised level in men.
    • An oestrogen-producing tumour of the ovary or adrenal gland, or advanced liver disease that slows oestrogen clearance.

  • What a lower result can point to

    • Menopause, when the ovaries stop releasing eggs and their oestrogen output falls away.
    • Primary ovarian insufficiency, in which the ovaries stop working earlier in life than expected.
    • A pituitary or hypothalamic problem interrupting the signal to the ovaries, including a tumour, surgery or radiotherapy in that area.
    • Very low body weight, disordered eating, or sustained heavy endurance training, which temporarily switch the reproductive signal off.
    • Medicines given deliberately to lower oestrogen, such as aromatase inhibitors or GnRH agonists.
    • Raised prolactin, which suppresses the pituitary hormones that drive the ovaries.

These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests: your doctor decides what it means for you.

Limitations & Safety

What this test cannot tell you

  • A result cannot be interpreted without knowing the cycle day it was taken on; the same value may be entirely normal or clearly abnormal depending on timing.
  • Laboratory methods differ, particularly at the low concentrations seen in men, in children and in women taking oestrogen-blocking treatment, so results are best compared within one laboratory.
  • High-dose biotin supplements can interfere with this type of assay and shift the result in either direction.
  • Estradiol describes ovarian activity at a single moment; on its own it does not diagnose infertility, menopause or a tumour.

Risks of the blood draw

  • Mild bruising or brief soreness where the needle went in.
  • Occasional lightheadedness, which settles after a few minutes of rest.
  • Bleeding or infection at the site, which is rare with sterile single-use equipment.
Key Points
  • 1Estradiol is the most active oestrogen and comes mainly from the developing follicles in the ovaries.
  • 2Timing is central: the sample should be taken on the cycle day your doctor names, counting from the first day of bleeding.
  • 3If your cycles are irregular or absent, or you are past menopause, the usual timing rules do not apply and your doctor will say when to attend.
  • 4It is normally interpreted alongside FSH, LH and often progesterone rather than on its own.
  • 5Men and women past menopause have naturally low levels; that is expected, not something to correct.
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Frequently Asked Questions

Everything you need to know about the Estradiol (E2) test. Can't find what you're looking for?

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Estradiol changes continuously through the month, so there is no single expected value. A level that is entirely ordinary just before ovulation would be unexpected during a period. Naming the cycle day is what turns the measurement into usable information.