Female Hair Loss Laboratory Panel

The Female Hair Loss Laboratory Panel is a blood testing package that measures selected sex and thyroid hormones that may be relevant when evaluating hair thinning or increased hair shedding in women. The panel includes free testosterone, total testosterone, DHEA-S, estrogen, follicle-stimulating hormone (FSH), luteinizing hormone (LH), progesterone, thyroid-stimulating hormone (TSH), free triiodothyronine (fT3), and free thyroxine (fT4).

These results can help identify hormonal or thyroid-related findings that may contribute to hair loss. The panel evaluates only one part of the possible causes. A scalp examination, the pattern and speed of hair loss, current medications, recent stress, nutrition, menstrual history, pregnancy, menopause, and previous illnesses are also important when deciding what further assessment may be needed.

What the panel measures

• Androgen-related markers: free testosterone, total testosterone, and DHEA-S can support evaluation of androgen activity when hair loss occurs with signs such as acne, increased facial or body hair, or menstrual irregularity.
• Reproductive hormones: estrogen, FSH, LH, and progesterone provide information that must be interpreted in relation to age, menstrual cycle phase, pregnancy, perimenopause, menopause, and the use of hormonal contraception or hormone therapy.
• Thyroid hormones: TSH, fT3, and fT4 help assess thyroid function, which may be relevant when hair changes occur together with symptoms such as fatigue and low energy or weight gain and difficulty losing weight.

When this laboratory panel may be considered

The panel may be considered when a woman notices persistent shedding, reduced hair density, widening of the central part, diffuse thinning across the scalp, or changes that occur alongside menstrual, thyroid, or other hormone-related symptoms. It may also be useful as part of a broader assessment in perimenopause or menopause, or when hormonal medication could influence the clinical picture.

Female pattern hair loss and other common forms of hair loss can occur even when hormone levels are within the laboratory reference range. The results therefore cannot confirm or exclude every possible cause and should not be interpreted as a diagnosis on their own.

What the panel does not assess

This package does not provide a complete assessment of nutritional, hematologic, autoimmune, inflammatory, infectious, genetic, or medication-related causes of hair loss. Depending on the symptoms and medical history, a doctor may consider additional tests such as a complete blood count, iron and ferritin testing, or other selected laboratory investigations. These tests are separate from this panel.

A clinical scalp examination remains important. The distribution of thinning, the presence of broken hairs, scaling, redness, pain, pustules, smooth patches, scarring, or loss of eyebrows and eyelashes can change the diagnostic pathway. Dermoscopy or trichoscopy may also be considered during a dermatology evaluation.

Preparation and timing

A venous blood sample is required. Before the appointment, confirm whether fasting is needed and whether testing should be coordinated with a particular phase of the menstrual cycle. Hormone concentrations can vary during the cycle, and interpretation may differ for women who are pregnant, perimenopausal, postmenopausal, or using hormonal contraception or hormone replacement therapy.

Prepare the date of the last menstrual period and the current cycle day when applicable. Report all prescription medications, hormonal products, over-the-counter medicines, and supplements. Do not stop prescribed medication or supplements solely for this test unless instructed by a qualified healthcare professional.

How testing is performed

Step 1: Review of relevant information

Information about the hair loss pattern, menstrual cycle, pregnancy or menopause status, medications, supplements, and previous laboratory findings helps place the results in context.

Step 2: Venous blood collection

A blood sample is collected from a vein, usually in the arm. The collection itself generally takes only a few minutes.

Step 3: Laboratory analysis

The sample is analyzed for the ten markers included in the panel: free testosterone, total testosterone, DHEA-S, estrogen, FSH, LH, progesterone, TSH, fT3, and fT4.

Step 4: Interpretation and possible next steps

The report presents the measured values and applicable laboratory reference intervals. Interpretation should account for age, menstrual cycle timing, menopausal status, pregnancy, symptoms, medications, and hormone therapy. A single result outside the reference interval does not establish the cause of hair loss, while results within range do not exclude non-hormonal causes.

When further evaluation may be needed

A dermatology assessment is particularly important when hair loss is sudden, rapidly progressive, patchy, painful, associated with scalp inflammation, or accompanied by visible scarring. Depending on the findings, further evaluation may include additional blood tests or consultation in dermatology, gynecology, or endocrinology.

Before sending an inquiry, prepare information about when the hair loss began, whether it is diffuse or localized, how quickly it is progressing, menstrual changes, pregnancy or menopause status, recent illness, significant stress, diet, medications, supplements, and any previous laboratory reports. Clear photographs of the scalp or hair part may also help describe the pattern. You can send this information through ZagrebMed to request laboratory testing and clarify the most appropriate next step.