Do Genetics Play a Role in Losing Your Period?
One of the hardest parts about recovering from hypothalamic amenorrhea (HA) can be the comparison.
You look around and see women skipping meals, overtraining, running on stress and caffeine, barely resting, and still getting regular periods, while your body seemed to wave the white flag much sooner. And if you’re anything like me, that can make you question yourself and wonder why your body responded differently.
Why did your period disappear when someone else’s didn’t?
I think this question matters more than people realize, not because fairness should determine your recovery, but because understanding why this may have happened can help you stop fighting your body and start supporting it.
Recovery becomes much harder when you stay focused on what other people’s bodies seem able to tolerate. Comparison can keep you stuck in the mindset that your body is “too sensitive” or that you should keep pushing harder like everyone else around you.
But is there a genetic component to period loss?
Do Genetics Play a Role?
Hypothalamic amenorrhea occurs when the brain suppresses reproductive hormone production in response to stress, low energy availability, excessive exercise, psychological stress, or a combination of these factors (Barbagallo et al., 2024). More specifically, the hypothalamus decreases pulsatile secretion of gonadotropin-releasing hormone (GnRH), thereby disrupting downstream reproductive hormones such as luteinizing hormone (LH) and follicle-stimulating hormone (FSH), ultimately leading to the loss of ovulation and menstruation (Caronia et al., 2011).
But something researchers have started paying closer attention to is the fact that not everyone responds to these stressors in the same way.
Two women can be eating similarly, exercising similarly, and dealing with similar stress levels, yet one develops HA while the other continues cycling normally. For a long time, this difference was not fully understood, but researchers now believe that genetic differences may partially explain why some women are more vulnerable to reproductive suppression than others (Caronia et al., 2011).
In simple terms, some women may have bodies that are more reactive to stress and energy deficiency, especially at the level of the hypothalamic-pituitary-gonadal (HPG) axis, which regulates reproductive function. And this makes sense when you think about how differently people respond to stress in general. Some people seem able to push themselves endlessly without immediate physical consequences, while others experience burnout, fatigue, or hormonal symptoms much sooner.
That does not make one body better than another. It simply means bodies are different.
What Does the Science Say?
This blog post began when I ran into a research paper titled “A Genetic Basis for Functional Hypothalamic Amenorrhea”, where they explored whether women with HA may carry genetic variants that make their reproductive systems more vulnerable to stressors such as under-fueling, excessive exercise, or emotional stress (Caronia et al., 2011).
Researchers found that some women with hypothalamic amenorrhea carried rare variants in genes involved in reproductive hormone signaling and pubertal development. Several of these genes are involved in GnRH neuron development and secretion, which is important because GnRH is the hormone released by the hypothalamus that initiates the reproductive hormone cascade necessary for ovulation and menstruation (Caronia et al., 2011). When GnRH pulsatility becomes disrupted, ovulation may stop, estrogen levels may decline, and menstrual cycles can disappear. The authors proposed that some women may have an underlying genetic predisposition that makes their reproductive systems more sensitive to stress and energy deficiency. In other words, their bodies may reach a physiological “danger threshold” sooner than someone else’s body might, even if outward behaviors appear similar (Caronia et al., 2011).
I think this is important because it helps explain why HA is not always just about how much exercise someone does or exactly how many calories they eat. There may be women whose bodies are simply less tolerant of chronic stress and low energy availability, even when their behaviors look similar to someone else’s from the outside. That does not mean lifestyle factors do not matter. They absolutely do! But it may explain why some women lose their cycles more easily than others.
Genetics Are Not The Whole Story
A second article, “Gene-environment interaction in functional hypothalamic amenorrhea”, built on this idea by explaining that HA is likely not caused by genetics alone and not caused by environmental stressors alone either (Barbagallo et al., 2024). Instead, the authors describe something called a gene-environment interaction, which means that genetics and lifestyle factors work together.
A woman may have a genetic predisposition that makes her more sensitive to stress or energy deficiency, but HA may only develop once environmental stressors are repeatedly layered on top of that predisposition over time (Barbagallo et al., 2024). These stressors can include chronic dieting, under-eating, excessive exercise, emotional stress, perfectionism, poor sleep, or constantly living in a high-stress state where the body never truly feels safe or adequately supported (Barbagallo et al., 2024).
This is why HA often develops gradually rather than overnight. The body adapts to stress for as long as it can, until eventually the cumulative strain becomes too much for the reproductive system to continue functioning normally. And I think this is where many women with HA recognize themselves. A lot of us were not simply exercising a little more or trying to “eat healthy.” Many of us were living in a constant state of pressure and control, even if we convinced ourselves it was normal or healthy at the time.
For me personally, perfectionism played a huge role. I thrived off productivity and stress, and I thought pushing harder was what made me disciplined and successful. Rest felt uncomfortable. Slowing down felt lazy. Hunger felt like something to suppress instead of respond to.
But eventually my body stopped cooperating.
How Genetics and Environment Work Together
One of the most helpful ways to think about this is that genetics may influence the sensitivity of the system, but the environment determines how much strain is repeatedly placed on that system over time. You may have a body that is more sensitive to stress, but whether HA develops often depends on what your body is repeatedly exposed to and for how long. And I actually think this perspective can be empowering rather than discouraging.
Because while we cannot completely control our genetics, we can influence the environment we create for our bodies moving forward. We can nourish ourselves adequately. We can reduce excessive exercise. We can improve sleep and stress management. We can learn healthier coping mechanisms that do not rely entirely on control, restriction, or overachievement. And all of those things matter tremendously for healing. Research consistently shows that improving energy availability and reducing stressors are big components of restoring hypothalamic function and ovulation in women with HA (Barbagallo et al., 2024). Your body is adaptable, but it cannot fully recover while remaining in the same environment that pushed it into survival mode in the first place.
Your Missing Period Is Not Your Body Failing You
I know it can feel frustrating when your body seems more sensitive than other people’s. But your body losing its cycle may have actually protected you from even greater long-term damage. Functional hypothalamic amenorrhea is associated with reduced estrogen levels, impaired bone health, cardiovascular changes, infertility, and metabolic adaptations that occur when the body perceives energy deficiency and chronic stress (Barbagallo et al., 2024). Because of this, losing a menstrual cycle is not something insignificant. It is a physiological signal that the body does not feel adequately supported.
There are many women who continue living in states of chronic stress and under-fueling while still getting a period, and because they never lose their cycle, they may assume everything is fine even when their bodies are struggling underneath the surface.
Strangely, losing your cycle can become an early warning sign that something needs attention before more serious damage occurs. Your body is not betraying you…It is communicating with you. And while that communication can feel frustrating or scary at first, it can ultimately become the thing that leads you toward healing.
What Really Matters Moving Forward
At the end of the day, genetics may absolutely play a role in who develops hypothalamic amenorrhea and how sensitive someone is to stress and energy deficiency.
But recovery still comes down to what you choose to do with the body you’ve been given. You cannot always control the cards you were dealt genetically, but you can control how you nourish, support, and care for yourself moving forward. And I think there is something hopeful in that. Because your body is not trying to punish you. It is trying to protect you and tell you that something needs support before more serious damage occurs. Sometimes losing your cycle is the very thing that forces you to finally slow down, listen to your body, and start healing in a deeper and more sustainable way.
Ready to Restore Your Cycle and Support Your Fertility?
If you are struggling with hypothalamic amenorrhea and feeling overwhelmed by recovery, you don’t have to navigate it alone.
At Nourished Fertility, we specialize in helping women restore ovulation, recover their cycles, and support fertility through evidence-based nutrition and root-cause healing.
You can apply for our Premier Period Recovery for Fertility program below.
Apply here to start your recovery journey.
Written by intern, Bri Van Camp
References
Barbagallo, F., Bosoni, D., Perone, V., Cucinella, L., Dealberti, D., Cannarella, R., Calogero, A. E., & Nappi, R. E. (2024). Gene-environment interaction in functional hypothalamic amenorrhea. Frontiers in Endocrinology, 15. https://doi.org/10.3389/fendo.2024.1423898
Caronia, L. M., Martin, C., Welt, C. K., Sykiotis, G. P., Quinton, R., Thambundit, A., Avbelj, M., et al. (2011). A genetic basis for functional hypothalamic amenorrhea. New England Journal of Medicine, 364(3), 215–225. https://doi.org/10.1056/NEJMoa0911064