What Is “Trimester Zero”—and Why Should You Care About It?

The growing “trimester zero” movement—beloved in some corners of the internet, vilified in others—is all about optimizing your health during the critical preconception period (typically three to six months pre-pregnancy, though it can be longer) to create the best outcomes for getting pregnant faster and having a healthy pregnancy. The influencers who promote it recommend getting the right nutrients, minimizing environmental toxins and adopting the ever-elusive advice to lower stress.

Almost five years ago with my son, I did very few things to prepare for pregnancy—extra supplements and other pre-pregnancy wellness routines just weren’t on my radar—and I ended up having a relatively uncomplicated pregnancy, birth and postpartum period. (I have a hunch it could have been easier and healthier if I had some of this trimester zero advice.)

But now that I’m 41 and have been through a miscarriage, I’m much more proactive about preconception prep for the potential next time around: I’m drinking water with minerals all day, taking supplements like CoQ10 to improve egg quality, trying to start my days with a protein-heavy breakfast and hitting up a strength-training class when I can.

Critics say trimester zero unnecessarily pressures and blames women, who already have enough to worry about. It’s easy to see how you could feel overwhelmed by all the content creators with their elaborate wellness routines. But, personally, when I look at preconception prep advice—even if the expert or content creator is doing more than I ever would—I feel far from blamed for my pregnancy loss. In fact, I feel empowered with the knowledge that I have more agency over my health.

Trimester zero isn’t a one-size-fits-all approach, and some women—especially those who have trouble conceiving—may work with a healthcare provider to optimize their fertility. “In my practice, I identify each woman’s primary fertility pattern before recommending a single food, herbal medicine, supplement or lifestyle change,” explains Dr. Gina Terinoni, DACM, LAc, a holistic fertility expert who supports women over 35 trying to conceive. “Not all fertility struggles have the same root.”

Interested in learning how trimester zero can work for you? Ahead is a no-stress, no-blame guide to preconception prep—including what tips to follow and what advice you can safely forget about.

Key Takeaways

• The trimester zero movement is about optimizing your health during the critical preconception period—typically three to six months pre-pregnancy—to create the best possible outcomes for fertility and pregnancy.
• While some women are following elaborate wellness routines pre-pregnancy, it helps to know that a few key basics can help, such as a well-balanced diet with nutrients such as choline, exercise, no smoking, taking a prenatal vitamin and regulating your nervous system.
• When trying to conceive (TTC), steer clear of any supplements, herbs or teas you haven’t discussed with a healthcare provider.
• It helps to keep things in perspective: If preconception prep is overwhelming you, try to simplify your routine—avoiding stress is key.

What Is Trimester Zero?

Trimester zero refers to the period around three to six months before conception when optimizing your health can potentially improve fertility, help you achieve a healthy pregnancy and maybe even prevent intense pregnancy symptoms. Part of the idea is that it takes the egg around 90 days to fully mature and the sperm around 70 days—so improving their health before you even start trying for baby makes sense.

While many doctors support some type of basic preconception prep, holistic fertility experts and wellness influencers are going further to focus on areas such as metabolic health and nervous system regulation.

The term itself started making the rounds on social media in late 2025 and early 2026, driven by wellness influencers looking to make their baby journeys as healthy as possible. Publications hopped on the trend, and some, most notably The Cut, were quick to describe it as a source of anxiety, blame and unrealistic, perfection-focused standards for women. Despite the criticism, many argue that simply following the standard “don’t smoke, get medical conditions under control, maybe take a prenatal” advice isn’t enough—that infertility and pregnancy issues aren’t always “random” and that women can actually have control over their prenatal health.

Why Trimester Zero Matters

Both traditional and holistic medical experts say that trimester zero matters because your preconception health plays a big role in fertility and pregnancy success. “Taking care of your health before pregnancy, including managing medical conditions, avoiding smoking or excess alcohol and starting supplements such as folic acid, can make a meaningful difference for both fertility and pregnancy outcomes,” explains Dr. Laura Gemmell, MD, a fertility expert at Columbia University Fertility Center.

Improving mitochondrial health—yes, the powerhouse of the cell—is also a growing area of interest, since mitochondria are the egg’s energy source, adds Dr. Gemmell. “As women age, mitochondrial function naturally declines, which is a key factor in reduced egg quality,” she says.

The good news? Cell health can be optimized, regardless of age. Dr. Terinoni argues that a woman’s age at conception—whether she’s over 35 or over 40—matters less than her overall health.

“The idea that your fertility falls off a cliff at 35 isn’t just inaccurate, it’s cruel,” Dr. Terinoni says. “I’ve worked with hundreds of women in their late 30s and early 40s who’ve conceived healthy babies by focusing on improving their egg quality and overall health, not by panicking about their age.”

Cece Sjoquist, a women’s health and hormone coach and social-media content creator, summarizes it like this in a TikTok video: “What you eat, your stress and your sleep all directly affect the quality of your eggs and his sperm. Why does quality matter? It lowers the risk for any complications or miscarriage, and it also promotes a healthy environment for baby and a healthy pregnancy.”

How to Make Trimester Zero Work for You

Trimester zero doesn’t have to be about expensive biohacking, unrealistic wellness routines or pages and pages of lab work you don’t necessarily need. Here are some practical, evidence-based steps you can incorporate to get a leg up on your preconception health.

• Start with the basics. “Maintaining a healthy weight, eating a balanced diet, exercising regularly and avoiding smoking or excess alcohol all have strong evidence for improving fertility and pregnancy outcomes,” says Dr. Gemmell.

• Optimize your nutrition. Lily Nichols, RDN, a registered dietitian and nutritionist and co-author of Real Food for Fertility, recommends the following trimester zero nutrition advice in her book: 1. Prioritize nutrient-dense animal foods: Opt for eggs for choline (crucial for brain development), liver and organ meat for vitamins and wild-caught fish for DHA. 2. Stabilize blood sugar to balance hormones: Start the day with 25 to 30 grams of protein, and eat protein before carbs to avoid blood-sugar spikes. 3. Include saturated fats from high-quality sources like grass-fed butter, tallow or avocado oil. These fats are the building blocks for your hormones.

• Take key supplements. A prenatal vitamin with at least 400 micrograms folic acid is essential even before conception, advises Dr. Gemmell. (Many experts recommend looking for a prenatal with methylated folate due to its higher rate of absorption; ask your provider for recommendations.) “CoQ10 is also commonly recommended, especially for women in their mid-30s and beyond, because of its role in mitochondrial function,” she adds.

• Take care of any underlying medical conditions. Conditions such as thyroid disorders and diabetes can impact fertility, says Dr. Gemmell. Make sure to speak with your provider about any existing health issues.

• Regulate your nervous system. Your fertility and stress response are closely linked. “Chronic stress … floods the body with cortisol,” explains Dr. Terinoni. This disrupts the hormones you need for successful ovulation, conception and implantation. Everyone has different nervous system regulation tools that work for them: For some, it’s working with a therapist. For me personally, meditation is what moves the needle the most.

• Address your metabolic health. Insulin resistance is a significant and often overlooked driver of fertility challenges, says Dr. Terinoni; in fact, it’s found in up to 65 percent of women with polycystic ovary syndrome (PCOS). “Eating warm, cooked, whole foods and reducing sugar and processed carbohydrates can shift this [metabolic sluggishness].” Targeted herbal medicine may help too. And, of course, it’s always proactive to check your blood sugar and your A1C (particularly if you have diabetes or prediabetes).

• See a physical therapist if you have concerns. During pregnancy, I had such painful symphysis pubis dysfunction (SPD) that I couldn’t turn over in bed sometimes, and I wish I had consulted with a PT—or at least done some targeted stretches—beforehand. “As a girl who has autoimmune conditions, who’s had old back injuries, hip injuries, knee injuries, things that just pop up for me, I know there’s so much stuff that I can do to bulletproof my body to be able to get pregnant without as many consequences,” says Dr. Kayla DPT, a TikTok creator and pelvic floor physical therapist.

When to Be Wary of Trimester Zero

Once you even remotely start thinking about TTC, your social media becomes flooded with magical gadgets and potions that promise to get you pregnant yesterday. I may have bought a “cortisol-lowering crystal fertility bracelet” on Instagram at one point—whether or not it does anything for fertility, at least it’s pretty.

While bracelets are generally harmless, steer clear of any supplements, herbs or teas you haven’t discussed with a healthcare provider. “There are definitely a lot of myths and products marketed to women trying to conceive, and most of them aren’t evidence-based,” warns Dr. Gemmell. “For example, while certain fertility teas, herbs or supplements are popular online, there’s very little scientific evidence that they can improve egg quality, fertility or pregnancy outcomes.”

Don’t fall for “the magic supplement,” echoes Dr. Terinoni. “This is the most dangerous myth of all, often promoted by influencers who are paid to sell a product, not to deliver a result,” she says. “Many of them have no medical training, no clinical experience and no accountability for what happens after you buy.”

Additionally, since supplements aren’t regulated by the U.S. Food and Drug Administration (FDA), quality and dosing can vary—another good reason to find a vetted, third party-tested brand through a trusted provider if you’re going the supplements route.

How to Avoid Anxiety During Trimester Zero

To avoid preconception anxiety, it helps to rethink trimester zero as “opportunity” instead of “to-do list.”

“The concept of trimester zero is often framed with urgency and fear,” says Dr. Terinoni. “I want to offer a different perspective: This preparatory window isn’t a deadline. It’s a chance to build a foundation of health that’ll support conception, carry you through pregnancy and set the tone for everything that follows.”

And if all of this information just gives you more anxiety and makes you feel guilty for not optimizing every step of your journey, here’s your permission to put down the phone and S-T-O-P. Everyone’s different, and some people thrive with more information while others just feel overwhelmed by it—and that’s perfectly okay.

“There’s no strong evidence that strict routines or excessive supplements will help you conceive faster or guarantee an easier pregnancy,” says Dr. Gemmell. “Being overly rigid can add unnecessary stress, so a balanced, realistic approach is key.”

It’s also important to know when to seek help: Generally, if you’re under 35, you’ll be advised to try for up to a year before seeing a fertility specialist; if you’re 35 or older, consider evaluation after six months.

Real Moms on What They Did During Trimester Zero

While some moms-to-be do barely anything during trimester zero and do just fine, others overhaul their wellness routines. Here are a few examples of what real moms and moms-to-be in The Bump community and on TikTok have done to prep their bodies for TTC and pregnancy.

“The biggest thing is actually a mindset shift. This is something my sister told me. She said, ‘Don’t start trying. Just stop not trying’—which I love. I’ve heard from many people who’ve tried to conceive, the second it becomes mechanical and like a chore and this pressure-filled thing, it doesn’t happen as easily. I also stopped using retinol in my skincare and started a prenatal vitamin.” — Mady Maio, TikTok creator

“I’m focusing on eating better and getting exercise in, especially walking, yoga and strength-training. Other than that? Nothing super special.” — Sarah F., mom of two in Fairfax, Virginia

“I’m taking a prenatal—you can never take one too early. As a resident, there have definitely been seasons where I’m not sleeping enough, not getting the nutrients I need from food. Starting a prenatal early feels like a small, but intentional way to start prioritizing my body before I ask it to start developing a human.” — Angel Turner, TikTok creator and ob-gyn resident

“I didn’t do too much to prepare other than take a prenatal multivitamin early, honestly. But I did prepare mentally and talked to my therapist, which was the most important part for me, and I went off some medications I was taking.” — Jessica G., mom of one in Washington, DC

“We’ve been focusing on nutrient-dense, whole foods and limiting ultra-processed foods and sugar—eating a lot of good-quality meat recently, organ meats, plenty of healthy fats and really prioritizing enough protein in each meal to keep blood sugar steady.” — Grace Wagner Spradlin, TikTok creator and holistic nutritionist

To Sum It Up

There’s real science to preconception prep, so it makes sense to have some type of trimester zero plan. But it doesn’t need to be over-the-top: Doing just a few basics, like making sure you’re eating well and taking a quality prenatal vitamin, can go a long way. Everyone’s trimester zero is going to look different, and if you’re not sure what to do, it’s a good idea to work with your provider to tailor a routine.

Of course, nothing is guaranteed. In my own journey, I’ve come to peace with the fact that pregnancy outcomes can be unpredictable no matter how much you try to optimize your health. But for me, it feels good to know I’m doing the best I can for my general (not just reproductive) health—no matter what the future holds.

How We Developed This Article

We spoke with an ob-gyn and a holistic fertility specialist to get different perspectives on the preconception period known as trimester zero. We included several academic studies in our research. We also scoured TikTok for preconception prep advice from moms-to-be, including a women’s health and hormone coach, a pelvic floor physical therapist and a holistic nutritionist. The author reported on her own experiences as a mom of one who’s currently TTC. After editing, this article was vetted through fact-check and reviewed by our ob-gyn medical adviser. Learn more about how we ensure the accuracy of our content through our editorial and medical review process.

About the author: Natalie Gontcharova is the senior editor at The Bump and a mom of one. As an “advanced maternal age” mom who’s TTC, she believes age isn’t the only predictor of fertility—and is eager to try various (evidence-based) tips to lower inflammation, improve metabolic health and regulate the nervous system.

Please note: The Bump and the materials and information it contains are not intended to, and do not constitute, medical or other health advice or diagnosis and should not be used as such. You should always consult with a qualified physician or health professional about your specific circumstances.