Understanding your reproductive health often feels like trying to read a map in a language you haven’t learned yet.
But your hormones aren’t mysterious forces working against you. They are simply chemical messengers.
At Gatachi, we believe that understanding these messengers is the first step toward fertility intelligence.
When you know what your hormones are doing, you move from uncertainty to clarity. You gain the ability to make informed fertility choices that align with your life and your timeline.
Here is a guide to the key players in your reproductive system and what they tell us about your biology.
AMH: The indicator of ovarian reserve
Anti-Müllerian Hormone (AMH) is one of the most talked about markers in fertility preservation.
Produced by the cells inside your ovarian follicles, AMH gives us insight into your ovarian reserve. The number of eggs you likely have available today.
Think of it as a gauge for quantity, not necessarily quality.
It is important to remember that AMH does not predict your ability to get pregnant naturally in the immediate future. Instead, it helps us understand your timeline so you can plan ahead.
FSH: The recruiter
Follicle-Stimulating Hormone (FSH) is the messenger sent from your brain to your ovaries.
Its job is exactly what it sounds like. It stimulates your ovarian follicles to grow and prepare an egg for ovulation.
If your ovarian reserve is lower, your brain often has to work harder to get the ovaries to respond, resulting in higher FSH levels.
We look at FSH in relation to other hormones to get a clear picture of how hard your system is working to ovulate.
Estradiol: The growth signal
Estradiol (E2) is the primary form of estrogen in your body during your reproductive years.
As your follicles grow, they release Estradiol. This hormone helps thicken the uterine lining to prepare for a potential pregnancy.
It also acts as a regulator. If Estradiol levels rise too early in your cycle, it can suppress FSH, which might mask a lower ovarian reserve.
This is why we look at these hormones together. Context is everything.
LH: The ovulation trigger
Luteinizing Hormone (LH) is the catalyst.
For most of your cycle, LH levels remain low. But just before ovulation, your body releases a sudden surge of LH.
This surge tells the dominant follicle to release an egg.
Tracking LH is essential for understanding your cycle mapping and identifying your fertile window.
Progesterone: The stabilizer
Once ovulation occurs, the empty follicle transforms into a structure called the corpus luteum, which produces Progesterone.
This hormone stabilizes the uterine lining, making it supportive for an embryo.
If you are trying to conceive, Progesterone is vital for maintaining a pregnancy. If conception doesn’t happen, levels drop, and your period begins.
Checking Progesterone levels about a week after expected ovulation confirms whether an egg was actually released.
TSH and Prolactin: The essential regulators
Reproductive health doesn’t exist in a vacuum. Other systems in your body play a massive role.
TSH (Thyroid Stimulating Hormone) indicates how your thyroid is functioning. Because thyroid hormones interact closely with reproductive hormones, levels outside the expected range can disrupt ovulation.
Prolactin is primarily known for milk production, but high levels outside of pregnancy can interfere with the signals from your brain to your ovaries, potentially pausing ovulation.
Why this data matters
Information is the antidote to anxiety.
When you look at your fertility through the lens of data, you aren’t relying on guesses or generic advice.
You are seeing your unique biological profile.
Whether you are a proactive planner considering egg freezing or simply want to understand your body better, this data gives you agency.
It allows you to make decisions based on evidence, not fear.
At Gatachi, we are here to help you translate these numbers into a personalized plan. Your biology is unique, and your timeline belongs to you.