Blood Tests Before Starting HRT: What Belongs on the Panel

A prescription can now arrive within days of an online form, with nobody drawing blood first. For years the frustration ran the other way, and plenty of women are still living in that version, asking for a panel and being told there's no point running one. Both are happening at once.

A baseline panel before a first HRT prescription should cover the hormones themselves (estradiol, progesterone, FSH and LH), a full thyroid panel rather than a lone TSH, ferritin, vitamin D and B12, fasting insulin and HbA1c, and a marker of inflammation. The hormones tell you what you're treating. The rest tells you what else might be causing the same symptoms.

Med Matrix is an HRT clinic offering hormone replacement therapy for Maine women, and this is the question we're asked most often by women who already have a prescription in hand.

Why a Prescription Got Easier to Get

Two things changed at once.

The first was regulatory. On February 12, 2026, the FDA approved labeling changes for the first six menopausal hormone therapy products, an action the agency initiated on November 10, 2025. We covered that decision when it landed, and the background is in our piece on the label change.

The second was who writes the prescription. Online menopause services grew into the same demand, and many of them are built around getting a first prescription out quickly. Speed is genuinely useful when a woman has spent years being told her sleep is a lifestyle problem. It stops being useful when speed is the entire product.

The numbers moved with it. Estrogen-based HRT prescribing rose 104.8% between January 2018 and February 2026, from 11.5 to 23.5 per 1,000 women with prescription data, in Truveta research published April 9, 2026. Truveta put prescribing among women aged 45 to 54 at 49.0 per 1,000 by February 2026, a 184.2% increase from 2018.

The researchers flagged their own limit, and it's worth repeating rather than burying: "Second, we did not confirm menopausal status, and some prescriptions may reflect use for other indications." Prescribing data can count prescriptions. It can't show who was evaluated first.

What a Baseline Is Actually For

A baseline is the measurement everything after it gets compared against. That's the whole job, and it's why the panel can't be run six months later and backfilled.

It tells you where you started. Eight weeks into a dose, the only useful question is whether anything moved. Without a starting number nobody can answer that, and the conversation defaults to how you feel on the day you're asked. Feelings are real data. They're also the easiest thing to second-guess at 4 a.m.

The second reason is the one women tend to find out about late. Exhaustion, weight that won't move, broken sleep, low mood, thinning hair, brain fog. That list sends women to a menopause service, and it's also the list for an underactive thyroid, low ferritin, low vitamin D, and rising fasting insulin. A prescription written off symptoms alone treats one possible cause and leaves the others running underneath it. The most common version of this is a thyroid assessed on a single marker, which we wrote about in the piece on normal TSH results.

It sets up the follow-up. Absorption isn't uniform. The same patch on two women doesn't produce the same level in the blood, and the way anyone finds that out is by measuring twice.

What Our Workup Covers Before a First Prescription

This is what we run and the reasoning behind each piece. It's a floor rather than a finished list, and what's right for you depends on your history and on what you're actually trying to fix.

• Estradiol, progesterone, FSH and LH. The hormone picture itself, read together rather than one value at a time.
• A thyroid panel, not a lone TSH. Free T3, free T4, and thyroid antibodies. TSH is a signaling hormone from the brain, and it can sit inside the reference range while the markers that run your metabolism sit at the bottom of theirs.
• Ferritin, vitamin D and B12, which are the deficiencies that imitate menopause closely enough to be mistaken for it.
• Fasting insulin and HbA1c. Weight and energy questions get answered here more often than women expect.
• hs-CRP, for inflammation.
• A full metabolic panel and a CBC.

Our new patient workup runs 80+ biomarkers for this reason. The overlap between hormone symptoms and everything else is wide, and separating them means looking at it all at once rather than a piece at a time across four appointments. The detail is on our advanced testing page.

If your experience has been the opposite one, where you asked for this panel and were refused, that's a different problem and we wrote it up in why your doctor won't test your hormones.

Questions Worth Asking If You Already Started

Nothing here is a reason to change what you're taking. These are questions for whoever prescribed it, and the answers belong to the two of you.

Can we run the panel now anyway? A first draw after you've started isn't a true baseline, and it's still worth having. It shows where you currently sit and whether anything else on the list above is contributing.

When should the blood be drawn relative to my dose? A level pulled the day after a change tells you about that day. Timing is the difference between a number that means something and a number that doesn't.

Does my chart show that I never had a starting number? Prescribers work from what's in front of them. If the file doesn't flag the baseline as missing, nobody downstream will treat it as missing.

If my product changed this year, should we recheck? Two products that both deliver estradiol don't necessarily deliver it the same way. Supply has been unsettled: ASHP has listed estradiol transdermal systems in shortage since January 2026, and the FDA hasn't added them to its own list. We covered that in the patch shortage piece.

That's a separate conversation from whether to start at all. If you haven't started yet and you're weighing it, the questions to ask before you begin are in HRT after 40, and the benefits and risks are walked through in our pros and cons piece.

How the Order of Operations Works Here

On a published episode of our podcast, Is HRT Safe Now?, Dr. Sasha Rose, ND, LAc, MSOM described the sequence: "When you meet with the provider, which happens after that, a full health history is done, symptom review, hormone timeline."

The labs come first, then the provider visit, and the history is read next to the numbers rather than in place of them. That ordering is the entire point. Our process runs the 80+ Biomarker Test & Full Body Scan, then Medical Team Reviews Everything, then the 60-Minute Provider Consultation, in that order, which is why the first appointment isn't where a prescription gets written.

Common Questions

Do I really need blood work before starting HRT?

A prescription can be written without it. Whether that's the right call is between you and your prescriber. What testing adds is a starting point to compare against later, and a check on the other conditions that produce the same symptoms.

What if my results come back normal?

Normal is a range built from a population, not a target built for you. A result sitting at the bottom of a reference range is still information, particularly when it's paired with a symptom history that points the same direction.

How often should levels be rechecked after starting?

That depends on the product, the dose, and what you're tracking, so it's a question for your prescriber. The principle is that a level is only interesting next to an earlier one.

Can I get this testing if I am already a patient somewhere else?

Yes. Plenty of women come to us for the workup while keeping the prescriber they have.

If you have a prescription and no idea what your starting numbers were, that's worth a real conversation with someone who will look at the actual data. Start feeling like yourself again. Book your free discovery call and we'll go through what's been tested, what hasn't, and what the numbers would need to show.