Why your sex drive changes across the month (and why it's not necessarily a relationship problem)
One week you can't keep your hands off your partner. Two weeks later, the thought of having sex makes you shudder.
It's confusing, and especially so if you find yourself wondering whether you've fallen out of love, whether the spark has gone or whether something is wrong with your relationship.
Often, nothing has changed except where you are in your menstrual cycle.
For many women, sexual desire naturally fluctuates across the month. For women living with PMDD, those shifts can feel even more intense, making it incredibly difficult to know what's hormonal, what's relational and what's actually true.
If you've ever found yourself thinking, Why do I feel like a completely different person before my period?, you're not alone.
If you're experiencing PMDD, you might also like to read PMDD and relationships: what your partner sees (and what's really happening), where I explore how cyclical changes can affect both you and your relationship.
Desire isn't designed to stay the same all month
Despite what films, social media and questionable magazine articles might have you believe, libido isn't supposed to be constant.
Around ovulation, rising oestrogen and testosterone can increase sexual desire for many women. After ovulation, progesterone becomes the dominant hormone, and it's completely normal for desire to shift.
That doesn't mean everyone experiences the same pattern. Some women notice very little change, while others experience dramatic differences from one phase of their cycle to the next.
Hormones are only part of the picture, too. Stress, poor sleep, medication, chronic pain, relationship dynamics, mental health and everyday life all influence desire.
So if your sex drive changes throughout the month, that isn't, in itself, a sign that your relationship is failing. It's a sign that you're wonderfully human.
Sometimes your cycle isn't changing your relationship, it's changing how much of yourself you can ignore.
One of the biggest fears I hear is: “what if these feelings mean I'm with the wrong person?". Sometimes they do. Sometimes they don't. The harder truth is that the luteal phase rarely gives us simple answers.
What it can do is make it harder to keep overriding yourself. Earlier in the month, you might happily say yes when you mean "maybe", brush off a comment that stung, or convince yourself that asking for more is unreasonable. Then your luteal phase arrives and suddenly everything feels impossible: you're irritated, touched out, questioning the relationship, wondering whether you've fallen out of love…
It can feel as though your hormones have created a completely different reality overnight.
But perhaps they haven't. Perhaps they've simply reduced your capacity to keep adapting around everyone else.
If you've spent years learning to minimise your own needs, prioritise someone else's comfort over your own, or disconnect from what your body is telling you, it's hardly surprising that the point in your cycle where your emotional resources are lowest is also the point where those strategies start to crack.
That doesn't mean every feeling is objectively true. But it also doesn't mean you should dismiss them because ‘it's just hormones’. Both positions ask you to stop being curious. The more useful question isn't "can I trust myself?", it's "what keeps showing up?"
Because if the same resentment, loneliness, pressure or uncertainty appears every single month, it needs curiosity, not dismissal.
Sometimes it isn't about your relationship at all
Of course, not every change in desire needs a deeper psychological explanation.
Sometimes you're exhausted.
Sometimes your pelvic pain has flared.
Sometimes you're navigating PMDD, perimenopause or medication that affects libido.
Sometimes your body simply wants rest instead of sex.
Not every low-desire phase is a relationship issue waiting to be solved; sometimes it's simply your body asking for something different.
Your desire isn't just about hormones
When we talk about libido, we often imagine it's something our hormones either switch on or switch off, but sexual desire doesn't exist in isolation, it lives alongside feeling emotionally safe.
Feeling connected to yourself.
Feeling able to say no.
Feeling able to want something without guilt.
For many women, particularly those who've learned to disappear inside relationships, sex can become another place where accommodation happens, where "yes" doesn't always mean enthusiastic desire and where pleasing someone else becomes easier than asking yourself what you actually want.
That's why changes in desire can feel so unsettling: they're not always pointing towards a problem with your relationship.
Sometimes they're inviting you back into a relationship with yourself.
Therapy isn't about deciding whether your hormones are lying
If every month leaves you wondering whether you're overreacting, imagining things or becoming someone you don't recognise, therapy can offer somewhere to slow that process down.
Not to tell you whether your relationship is "good" or "bad" or to decide whether your hormones are right or wrong, but to become curious about the patterns that keep repeating, the compromises you've normalised and the parts of yourself that only seem able to speak when your usual ways of coping stop working.
Your cycle isn't there to make your life difficult. Sometimes it reveals the places where you've become disconnected from yourself long before your hormones entered the conversation
