“If a Romance Movie Made Your Heart Flutter… Your Body Was Preparing for Love at That Very Moment”
Emotions of love alter the brain and move hormones… The ‘Brain-Gonad Axis’ highlighted by reproductive medicine
While watching a movie, a first love suddenly comes to mind. Memories of holding hands long ago are revived, and a desire to love someone again surges forward. Is this merely a sentimental feeling?
Recent neuroscience and reproductive science research suggests otherwise. While romance movies do not directly induce pregnancy, the emotions generated by love and excitement alter the brain and hormones, creating a hospitable environment for reproductive functions.
The ‘Brain-Gonad Axis’ and Neurotransmitters
In the past, reproductive medicine focused primarily on reproductive organs themselves, such as the ovaries, uterus, sperm, and eggs. Increasingly, however, emphasis is placed on the fact that the brain serves as the starting point regulating reproductive functions. In particular, successive studies show that the hypothalamic-pituitary-gonadal (HPG) axis—which connects the hypothalamus, pituitary gland, and ovaries—responds sensitively to emotions and stress.
When people fall in love or spend time with a partner, the brain secretes various neurotransmitters, including dopamine, oxytocin, serotonin, and endorphins. Dopamine heightens anticipation and excitement, oxytocin strengthens trust and attachment, and serotonin increases psychological stability.
Multiple studies confirm that these shifts act to lower the stress hormone cortisol, rather than merely improving mood.
Conversely, chronic stress stands as one of the greatest enemies of reproductive function.
When stressed, the brain’s HPA axis activates, increasing cortisol secretion. If cortisol remains elevated over a long period, GnRH secreted from the hypothalamus is suppressed, which subsequently impacts FSH and LH secretion, destabilizing ovulation and reproductive health.
A study recently published in the international journal Reproductive Biology and Endocrinology likewise emphasized that ongoing stress, anxiety, and depression can create a vicious cycle with declining ovarian function, underscoring the need for mental health management during fertility treatments.
How the Brain Processes Romance
Interestingly, similar brain responses can occur even without being in an actual romantic relationship.
Simply empathizing with protagonists while watching a romance movie or recalling a first love activates the brain’s reward and emotional circuits.
Functional magnetic resonance imaging (fMRI) studies have shown that viewing pictures of a loved one or recalling memories of love activates dopamine reward pathways, including the ventral tegmental area (VTA) and the caudate nucleus.
In other words, while the brain does not process actual love and the experience of recalling love in an entirely identical manner, it utilizes largely overlapping neural networks.
Thus, feeling your heart flutter after watching a romance movie, wanting to meet someone, or recalling happy memories is not mere sentimentality; it is a process where the brain reactivates neural circuits connected to love.
The positive neurotransmitters secreted during this process stabilize the autonomic nervous system, improve blood circulation, and contribute to heightening libido and intimacy.
Indeed, a recent systematic review reported that stable affectionate relationships positively influence the neuroendocrine, immune, and stress response systems. The researchers analyzed that love and attachment are deeply intertwined with biological mechanisms maintaining the body’s homeostasis.
The Boundary Between Emotion and Clinical Reality
Certain distinctions must be drawn here, however. This does not mean watching many romance movies increases the probability of pregnancy. Past research merely demonstrates that positive emotions can create a favorable environment for reproductive function; it does not provide evidence that a single movie enhances egg quality or directly improves implantation rates.
A meta-analysis published in the BMJ also confirmed no definitive evidence that pre-IVF stress and anxiety significantly reduce pregnancy success rates.
Experts explain, “While the simplistic formula that ‘stress blocks pregnancy’ does not hold true, it is clear that feelings of happiness and stability help maintain healthy physiological functions across the entire body.”
This is also why modern fertility treatments encourage laughing with a partner, holding hands, listening to music, taking walks in nature, and recalling positive memories. Treating more than just the physical body—making the brain feel that “it is safe and happy right now”—can positively influence reproductive health.
Conclusion
Ultimately, love is not an emotion confined to the heart. The moment love is felt, the brain alters hormones, and hormones in turn alter the body. A single romance movie cannot create a pregnancy. Yet at the exact moment the desire to love blossoms anew, our brains and bodies begin to operate in a state slightly different from before. That is the “biology of love” newly brought into focus by reproductive medicine.
※ This article was synthesized by analyzing the latest research published in international journals such as Reproductive Biology and Endocrinology and the British Medical Journal (BMJ), along with neuroscience studies addressing the impacts of love, attachment, and stress on the brain and reproductive hormones. It does not replace a specific individual’s diagnosis or treatment, and actual medical judgment must be made through consultation with a specialist.
※ Image: The movie The Notebook (2004), an American romance-drama depicting the enduring love of a man and woman from different backgrounds, stands as a representative work of modern romance cinema. The photo captures a scene from the film.