Fertility Hormone Testing: What To Test And When

Our bodies hold a wealth of information, much of which can be communicated via labs. When labs are timed correctly and interpreted in the context of your unique cycle, they can become a helpful map guiding you in your fertility journey.

If you have already consulted with a practitioner you may have been told to “get your labs done,” but it can be a struggle to understand what to test for and when. And it can be challenging to connect all of the medical terminology to our own bodies’ rhythms. The truth is that getting familiar with these labs and how they relate to your cycle can reduce stress and confusion and also improve fertility outcomes.

Let’s try and break this down in a way that makes sense.

Why timing matters

When it comes to fertility hormones, timing is everything.

Your hormones are not static. They shift throughout your cycle in a very specific rhythm. Testing on the wrong day can give you a completely misleading picture.

So if you’ve ever had labs come back “normal” but something still feels off… it might just be that the timing of the lab work was off.

Mapping out the cycle

Cycle Day 1 = the first day of full menstrual flow (not spotting)

From there, we map everything based on phases:

• Follicular phase (first half of cycle)

• Ovulation window (mid-cycle)

• Luteal phase (after ovulation)

Each phase tells us something different about how your body is functioning.

Cycle Days 2–4: The Foundation Phase

This is one of the most important windows for fertility testing.

It gives us insight into ovarian reserve, brain-to-ovary communication, and baseline hormone function.

Recommended labs:

• FSH

• LH

• Estradiol (E2)

• AMH (can be tested any day of cycle)

• Prolactin

• TSH

• T3 and T4

• Thyroid antibodies (TPO, TgAb)

What we are looking at:

• How your brain is signaling to your ovaries

• How many follicles may be available (ovarian reserve)

• Whether estrogen is appropriately low at baseline

• Thyroid and pituitary balance

This is your starting point.
If this phase is off, it can ripple through the entire cycle.

Sometimes what we see clinically:

• Cycles that are “regular,” but hormones aren’t communicating efficiently

• Thyroid antibodies present even when TSH is “normal”

• Early signs of diminished ovarian reserve that weren’t previously caught

These are things we can work with—but only if we know they’re there.

Mid-Cycle: The Ovulation Window

This is when the body shifts into movement, growth, and release.

For a 28-day cycle, this is usually around Cycle Days 12–16, but it varies person to person.

Recommended labs or tracking:

• Estradiol

• LH (or ovulation predictor kits at home)

What we are looking for:

• A healthy rise in estrogen

• A clear LH surge signaling ovulation

This phase tells us:
If your body actually preparing to ovulate, and getting the signal to do so.

Sometimes what we see:

• LH surges that are unclear

• Estrogen that doesn’t rise high enough

• Ovulation that is delayed or inconsistent

From a TCM perspective, this is often where we see stagnation or lack of smooth flow.

The Luteal Phase

This is when the uterus prepares to either nourish a pregnancy, or begin the menstrual cycle.

Recommended labs:

• Progesterone*

• Estradiol

What we are looking for:

• Strong progesterone production

• Adequate support for implantation

*Test progesterone 7 days after you ovulate

Example:
If you ovulate on Day 16 → test on Day 23

Though some doctors may recommend it, progesterone should not be tested on a fixed day like “Day 21” unless you ovulate on Day 14. Always test seven days after your ovulation day.

This phase answers a critical question:

Is ovulation actually strong enough to support a pregnancy?

What we often see:

• Ovulation is happening, but progesterone is below the ideal level

• Luteal phases that are short

• Hormones that rise, but don’t sustain

This can show up as:

• Spotting before your period

• Short cycles

• Early pregnancy loss

Getting into the “deeper layers” (when cycles are not straightforward)

Androgen & Metabolic Testing

Especially important for:

• Irregular cycles

• PCOS symptoms

• Acne or hair growth

• Blood sugar issues

Labs (can be done any day, fasting preferred):

• Total Testosterone

• Free Testosterone

• DHEA-S

• SHBG

• Fasting Glucose

• Fasting Insulin

• Hemoglobin A1C

Why this matters:

Blood sugar and insulin directly impact ovulation and egg quality.
Even subtle imbalances can disrupt the entire cycle.

Stress & Adrenal Health

We don’t always think of stress as a “lab value”…
but it absolutely shows up in the body.

Optional testing:

• Cortisol (AM or 4-point saliva)

• DHEA-S

Chronic stress can:

• Delay or suppress ovulation

• Lower progesterone

• Impact implantation

Sometimes the missing piece isn’t another supplement—
it’s helping the nervous system feel safe enough to ovulate.

Recurrent Pregnancy Loss

If you’ve experienced:

• 2 or more miscarriages

• Chemical pregnancies

• Early losses

Testing may include:

Immune & Clotting

• Antiphospholipid Antibody Panel (APS)

• ANA

• CRP / hs-CRP

Thyroid & Autoimmune

• TSH

• Free T4

• Free T3

• TPO antibodies

• Thyroglobulin antibodies

Nutrients & Blood Health

• Ferritin

• Vitamin D

• Vitamin B12

• Folate / RBC Folate

• Homocysteine

These tests can uncover patterns that aren’t always looked at initially but can provide a snapshot as to what is going on with the body’s endocrine and hormone systems.

Putting it into traditional Chinese medicine terms…

Your cycle is a rhythm.

• Follicular phase = building Blood & Yin

• Ovulation = movement of Qi

• Luteal phase = holding with Yang

When one phase is off, it’s not just a “number on a lab.”
It’s a shift in the overall system.

We as your acupuncturists might see these imbalances as:

• Blood deficiency (examples: irregular periods or brown/ scant blood)

• Qi stagnation (examples: painful periods, disruptive PMS)

• Kidney deficiency (examples: fatigue, weakened immune system, feeling cold)

• Dampness or phlegm (examples: fibroids, endometriosis, recurrent yeast infections and UTIs)

Key reminders

We know this is a lot of information so here are some important highlights:

• Progesterone must be tested 7 days after ovulation

• Thyroid antibodies matter—even if TSH is normal

• Lab timing directly impacts accuracy

• “Normal” does not always mean optimal for fertility

How does acupuncture fit in here?

Acupuncture helps your body:

• Regulate communication between brain and ovaries

• Improve blood flow to the uterus and ovaries

• Support hormone balance across the cycle

• Reduce stress patterns that interfere with ovulation

• Strengthen the luteal phase

In TCM terms, we are:

• Nourishing Blood and Yin

• Supporting Kidney Jing

• Moving Liver Qi

• Strengthening Spleen function

In modern terms, many patients notice:

• More regular cycles

• Better ovulation signs

• Improved sleep and digestion

• Less PMS and pain

• A deeper sense of calm in the process

We hope this can offer a little encouragement and clarity in your endeavors to understand your body’s natural rhythms. And if you find yourself stuck, don’t be discouraged. It takes time and we are always here to answer questions along the way!