Overview.
The female fertility panel evaluates reproductive hormone function, ovarian reserve, and ovulation status. Unlike most blood panels, fertility testing is cycle-dependent — Day 3 hormones, any-day AMH, and Day 21 progesterone each serve distinct diagnostic purposes. The ASRM recommends a systematic, cost-effective evaluation prioritising the least invasive methods first.
A complete female fertility panel measures Day 3 FSH, LH, and estradiol (baseline gonadal function), AMH (ovarian reserve quantity), Day 21 progesterone (ovulation confirmation), thyroid function (TSH, Free T4), and prolactin. Additional markers like DHEA-S, testosterone, and fasting insulin are added when PCOS is suspected.
What's included.
- FSH (Day 3) — normal: 3-10 mIU/mL · Ovarian response baseline (elevated >10-12 = diminished reserve)
- LH (Day 3) — normal: 2-15 mIU/mL · Gonadotropin drive (LH:FSH >2:1 = PCOS pattern)
- Estradiol (Day 3) — normal: <80 pg/mL · Should be low at baseline (high E2 masks poor FSH)
- AMH (Any Day) — normal: 1.0-4.0 ng/mL · Ovarian reserve quantity (not quality)
- Progesterone (Day 21 / 7 DPO) — normal: >10 ng/mL · Confirms ovulation occurred this cycle
- TSH — normal: 0.4-2.5 mIU/L · Fertility-specific target (tighter than standard 0.4-4.0)
- Prolactin — normal: <25 ng/mL · Elevated prolactin suppresses ovulation
Preparation.
No fasting required.
When: Requires multiple draws across one menstrual cycle. Day 3 hormones in the early follicular phase, AMH anytime, and progesterone in the mid-luteal phase. Thyroid and prolactin can be drawn with Day 3 hormones for convenience.
- Day 3 hormones MUST be drawn on cycle days 2-5 (Day 1 = first day of full flow)
- AMH can be drawn on any cycle day
- Day 21 progesterone: adjust to 7 days post-ovulation if cycle is not 28 days
- Prolactin: draw in a relaxed state, avoid breast stimulation and vigorous exercise for 24 hours
- Stop biotin supplements 2-3 days before thyroid testing
- Note if on oral contraceptives — OCPs suppress AMH by ~30%
When it's ordered.
- Trying to conceive for 12+ months (under 35) or 6+ months (35-39)
- Immediately if age 40+ and planning conception
- Irregular or absent menstrual cycles
- Known risk factors: PCOS, endometriosis, prior pelvic surgery
- Family history of early menopause or premature ovarian insufficiency
- Pre-IVF or pre-egg-freezing assessment
- Pre-conception baseline at any age
Interpretation.
What normal means
Ovarian reserve is adequate, ovulation is occurring, thyroid function supports fertility, and prolactin is not suppressing the reproductive axis. Normal results do not guarantee fertility — egg quality, tubal patency, and uterine factors require separate assessment.
Abnormal patterns
Low AMH (<1.0 ng/mL) + Elevated Day 3 FSH (>10-12 mIU/mL)
Possible causes
- Diminished ovarian reserve (DOR)
- Age-related decline
- Prior ovarian surgery
- Premature ovarian insufficiency (if under 40)
Next steps
- Antral follicle count (AFC) ultrasound
- Reproductive endocrinologist referral
- Discuss timeline urgency — reserve is declining
Elevated LH:FSH ratio (>2:1) + Elevated testosterone + Anovulatory progesterone
Possible causes
- PCOS (polycystic ovary syndrome)
- Late-onset congenital adrenal hyperplasia (if DHEA-S markedly elevated)
Next steps
- Pelvic ultrasound for polycystic morphology
- Fasting insulin and HOMA-IR
- Apply Rotterdam diagnostic criteria
Low FSH + Low LH + Very low estradiol (<30 pg/mL) + Normal AMH
Possible causes
- Hypothalamic amenorrhoea
- Excessive exercise or low BMI
- Severe psychological stress
Next steps
- Assess BMI, exercise, and stress levels
- Nutritional counselling
- Consider pituitary imaging if not explained by lifestyle
Day 21 progesterone <3 ng/mL with regular cycles
Possible causes
- Anovulatory cycles despite regular bleeding
- Incorrect timing (tested too early or too late in luteal phase)
Next steps
- Confirm timing relative to ovulation (use OPK or basal body temp)
- Repeat next cycle with corrected timing
- Consider ovulation induction if confirmed anovulatory
Elevated prolactin (>25 ng/mL) with irregular cycles
Possible causes
- Medications (antipsychotics, metoclopramide)
- Hypothyroidism (elevated TRH stimulates prolactin)
- Prolactinoma (pituitary adenoma)
Next steps
- Repeat prolactin fasting and relaxed
- Check TSH to rule out thyroid cause
- Pituitary MRI if prolactin >100 ng/mL or persistently elevated
Cost & access.
Full panel costs $300-700 without insurance in the US. Individual tests: Day 3 hormones $50-150, AMH $70-150, progesterone $30-80, thyroid $30-90. Most insurance covers fertility testing with clinical indication. Many tests can be ordered by a primary care physician or OB/GYN before specialist referral.
FAQs.
Why do I need to test on specific cycle days?
FSH, LH, and estradiol fluctuate dramatically across the menstrual cycle. Day 3 (early follicular phase) is when baseline gonadal function is most interpretable. Testing on Day 10 or Day 15 produces results that cannot be meaningfully compared to reference ranges. Progesterone must be drawn 7 days after ovulation to confirm the corpus luteum is functioning.
What if I have irregular cycles and can't identify Day 3?
If you can't predict when a period will start, AMH (any day) and thyroid/prolactin testing can proceed immediately. For Day 3 hormones, draw blood on days 2-5 of your next period whenever it arrives. For progesterone, use ovulation predictor kits (OPKs) to identify ovulation, then test 7 days later.
Does a normal AMH mean I can wait to have children?
Not necessarily. AMH measures egg quantity, not quality. Egg quality declines with age regardless of reserve level. A 38-year-old with excellent AMH still has lower egg quality than a 28-year-old with the same AMH. AMH provides reassurance about reserve but not a fertility guarantee.
My Day 3 FSH is elevated but my AMH is normal — which do I trust?
Both matter. Day 3 FSH can vary cycle to cycle, while AMH is more stable. An elevated FSH with normal AMH may reflect a 'bad month' or early reserve decline. The combination of AMH + FSH + AFC (antral follicle count on ultrasound) gives the most complete picture.