Taking GLP-1s for Your Fertility? 5 Things You Need to Know
If you are taking a GLP-1 while navigating your fertility, this post is five practical things to make sure your body is still getting what it needs.
Whether this medication was your choice or something you felt you had no option but to do, your body deserves support through this process. And in most cases, the things in this post are things nobody told you.
This post is not about whether you should take it. That decision is yours, made in a system that does not always give you real options. What this post is about is making sure that while you are on it, your body is still having its needs met. Because in almost every conversation I have with folks navigating GLP-1s and fertility, the same things keep coming up. Things they were never told. Things that matter.
Here are five of them.
1. GLP-1s deplete the nutrients your body needs for pregnancy
This is the one I want you to pay the most attention to, because it is the one where you can take real action right now.
GLP-1 medications work by slowing down your digestive system and reducing your hunger signals. As a result, you eat less: somewhere between 16 to 40% fewer calories on average, according to the research. That drop in food intake means a drop in the nutrients that come with food.
The nutrients most at risk are ones you will recognise from every fertility supplement: folate, iron, vitamin D, B12, and zinc. These are foundational for fertility and early pregnancy. Folate is prescribed to everyone trying to get pregnant. Iron supports egg quality and implantation. Vitamin D is increasingly linked to cycle regulation. All of them at risk, all of them quietly depleted, while you are on a medication that was supposed to be helping.
One study found that over 20% of people taking GLP-1s were diagnosed with nutritional deficiencies within twelve months. And that is almost certainly an undercount, because routine testing is not being offered.
So here is what I want you to do. Ask whoever prescribed this medication — your GP, your fertility clinic, your OBGYN — to run a full nutrient panel every six months as a minimum. Iron, ferritin, vitamin D, B12, folate. If they won't, ask your GP separately, or look into private testing if needed. Getting this checked and supplementing where necessary is the single most important thing you can do right now to make sure your body is ready when you are.
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2. Your thirst signals are being suppressed too
This one surprises a lot of people, because it is rarely mentioned.
The same mechanism in GLP-1s that reduces your hunger also reduces your thirst. You may simply not feel thirsty, even when your body needs water. And if no one has told you this, you might just think you are not thirsty and carry on.
This matters for fertility because cervical mucus, uterine lining, and egg quality all rely on adequate hydration. And it matters for your general health: both the MHRA in the UK and the FDA in the US have issued warnings about severe dehydration in people taking these medications.
Signs to watch for: dark urine, low energy, brain fog, constipation, lightheadedness.
The practical fix is simple: do not wait to feel thirsty. Track what you are drinking deliberately. And use a quick visual check, your urine should be a pale straw colour. If it is darker than that, that is your cue to drink. Small and consistent, rather than waiting until you feel it.
3. Your cycle may change, and some changes need acting on quickly
GLP-1s can affect a range of things you might use to track your cycle: body temperature, cervical mucus, energy levels, libido. Basal body temperature can decrease. Cervical mucus can reduce, partly as an effect of the dehydration we just talked about.
None of this is automatically cause for alarm. But there are some changes that matter a lot.
If your cycles start to lengthen significantly, if you stop noticing signs of ovulation, or if your period disappears altogether, these can indicate that the caloric restriction the medication is causing has started to suppress your reproductive function. This is a known effect of significant caloric restriction on the body, and it needs to be addressed. The sooner you act on it, whether that means adjusting the dose, coming off the medication, or changing your approach entirely, the sooner you can reverse it.
If you notice these changes, please tell your doctor. Do not sit on this information.
A brief but important note: GLP-1s can be particularly difficult for people with a history of eating disorders or disordered eating. People in bigger bodies are often never diagnosed with eating disorders because they do not look like what the medical system expects. If any of that resonates, it is worth keeping an honest eye on how your relationship with food is shifting as you use this medication.
4. Your sex drive may change, and that is the medication talking
GLP-1s can affect libido in either direction. Some people notice a decrease. Some notice an increase. Both are real possibilities, and both are worth knowing about.
In a space where sex already carries so much weight,where it has often been tied to timing, pressure, and the relentless machinery of trying to conceive,not knowing this can mean you absorb any change as something personal. Something about your relationship, or your body, or your mental state.
It is often the medication.
Knowing that going in means you can talk about it rather than carry it quietly. With your partner if you have one. With your doctor if that feels useful. You deserve to feel connected. You deserve pleasure and intimacy through this process, not one more thing that feels harder than it should. The more openly you can talk about what is changing, the easier it is to find a way through it together.
5. If GLP-1 has been helping regulate your cycle, it is not the only tool
For some folks, particularly those with PCOS or insulin resistance, a GLP-1 may actually be having a positive effect on their cycle. Cycles that were irregular have become more regular. That is real, and it is worth naming.
It also tells you something important about what is going on in your body: blood sugar regulation is playing a significant role in your cycle health. That is genuinely useful information.
But it does not mean GLP-1 is the only solution. And it does not mean you are trapped.
Inositol is one of my favourites here: well-researched, widely available, and safe to take when trying to get pregnant and through pregnancy. Metformin is another option for some people, depending on what is going on clinically. These are real tools, just as effective for blood sugar regulation, and ones you can use when you are ready to start trying again.
The key thing to hold onto: the weight was not the variable that mattered. The blood sugar was. And there are other ways to address blood sugar that do not require you to pause your life.
While you are here, your body still deserves to have its needs met
The fact that you are in this situation at all is a failure of the healthcare system. Not of you.
Being in a bigger body is not a medical condition. It is not something that needs treating before you can access fertility care. The system that has made you wait, that has made you take a significant medication as a condition of the help you needed, that system is the problem. Your body is not the problem.
What you can do right now, in the body you are in, on the medication you are taking, is make sure your body still has what it needs. Test your nutrients. Stay hydrated deliberately. Keep an eye on your cycle and act if something significant changes. Talk to someone if your sex drive shifts. Know that there are other blood sugar tools waiting for you when you are ready.
You are navigating a complicated, biased system in the best way you can. That is not a small thing. It deserves to be named.
If you want someone who understands exactly what you are up against and can help you build a strategy that actually fits your situation, a LINK Roadmap session is where we start. Ninety minutes, just us, working out what is actually possible and what your next steps are.
Resources:
Rejoova supplements. Use code FERTILE for 10% off at getrejoova.com — AD: affiliate link
Full episode transcript available on request for accessibility.