Preparing your body for pregnancy ideally starts at least three months before you try to conceive, though some steps are worth starting even earlier. That window gives you time to build up nutrient stores, update vaccinations, address any chronic health conditions, and reduce exposures that could affect a developing baby in its earliest weeks. Here’s what that preparation looks like in practice.
Start Folic Acid Early
The CDC recommends 400 micrograms of folic acid daily for all women who could become pregnant. This B vitamin helps prevent major birth defects of the brain and spine, and the critical window for its protection is the first few weeks after conception, often before you even know you’re pregnant. That’s why starting well before you conceive matters more than ramping up after a positive test.
A standard prenatal vitamin covers the 400 mcg target plus other nutrients like iron, calcium, and vitamin D that support a healthy pregnancy. If you have a history of neural tube defects in a previous pregnancy or in your family, your provider may recommend a higher dose.
Schedule a Preconception Checkup
A preconception visit is a full review of everything that could affect a pregnancy. It’s different from a standard annual exam because it’s focused specifically on identifying and managing risks before conception, not after. Expect your provider to cover several areas:
- Chronic conditions. Diabetes, high blood pressure, thyroid disorders, and mood disorders all benefit from adjusted treatment plans before pregnancy. Medications that work well for you now may need to be switched to pregnancy-safe alternatives.
- Medication review. Some common prescriptions can harm a developing fetus. Your provider will review everything you take, including over-the-counter products, herbal supplements, and vitamins, and make changes where needed.
- Infection screening. Depending on your age and risk factors, screening for STIs like chlamydia, gonorrhea, syphilis, and HIV may be recommended. Hepatitis C and tuberculosis screening are also part of the standard checklist.
- Family history. If genetic disorders, birth defects, cystic fibrosis, or conditions like sickle cell disease run in either partner’s family, your provider may refer you for genetic counseling. Ashkenazi Jewish ancestry carries elevated risk for several specific conditions including Tay-Sachs disease.
Update Your Vaccinations
Certain vaccines can’t be given during pregnancy because they contain live virus, so you need them beforehand. The two most important are MMR (measles, mumps, rubella) and varicella (chickenpox). A blood test can confirm whether you’re already immune. If you need either vaccine, you should wait at least one month after receiving it before trying to conceive.
A flu shot is safe at any time and recommended annually. Your provider will also check whether you’re current on hepatitis B, Tdap, and HPV vaccines based on the standard adult schedule.
Reach a Healthy Weight
A BMI between 18.5 and 24.9 is associated with the best fertility outcomes. Being outside that range in either direction can disrupt the hormonal balance that controls ovulation, making it harder to conceive and increasing the risk of pregnancy complications.
Being underweight (BMI under 18.5) can cause irregular or absent periods by suppressing the hormones that trigger egg release. On the other end, a BMI above 25 is linked to ovulation problems, menstrual irregularity, and higher rates of gestational diabetes and preeclampsia during pregnancy. Even modest changes toward a healthier weight can improve your chances. The goal isn’t a crash diet or an intense new exercise regimen. Sustainable shifts in eating and activity, started months before conception, are more effective and safer.
Clean Up Your Diet
A nutrient-dense diet before pregnancy builds the reserves your body will draw on heavily in the first trimester. Focus on folate-rich foods like leafy greens, lentils, and fortified grains alongside your supplement. Iron, calcium, and omega-3 fatty acids from fish are all important.
Speaking of fish: start following the same mercury guidelines now that apply during pregnancy. Avoid high-mercury species like bigeye tuna, king mackerel, shark, swordfish, and Gulf of Mexico tilefish. Lower-mercury options like salmon, shrimp, and sardines are safe and provide beneficial omega-3s. The FDA recommends two to three servings of low-mercury fish per week.
Moderate your caffeine intake as well. Most reproductive health guidelines suggest keeping consumption under 200 milligrams per day, roughly one 12-ounce cup of coffee. Alcohol is worth cutting out entirely once you’re actively trying, since there’s no established safe amount during the earliest stages of pregnancy.
Reduce Exposure to Hormone-Disrupting Chemicals
Endocrine disruptors are chemicals that interfere with your body’s hormonal signaling, and they show up in a surprising number of everyday products. You can’t eliminate all exposure, but you can reduce it meaningfully with a few changes.
BPA is found in some canned food linings and hard plastics. Switching to glass or stainless steel containers and avoiding microwaving plastic helps. Phthalates are common in fragranced products like nail polish, hair spray, and scented lotions. Choosing fragrance-free personal care products is one of the simplest swaps you can make. PFAS, sometimes called “forever chemicals,” coat nonstick cookware and stain-resistant textiles. Cast iron or stainless steel pans are easy alternatives.
Pesticide residue on produce is another source. Washing fruits and vegetables thoroughly or choosing organic for the most heavily sprayed crops reduces intake. Flame retardants in older furniture foam and carpet are harder to avoid, but regular vacuuming and handwashing after contact with dusty surfaces helps limit exposure.
Plan Your Contraception Transition
How quickly fertility returns after stopping birth control depends on the method. A large review of the research found that about 83% of women became pregnant within 12 months of stopping contraception, regardless of the type used. But the timeline for that first ovulation varies.
After stopping the pill, fertility tends to return quickly, with a 12-month pregnancy rate around 87%. IUD removal shows similar results, around 85% within a year. Hormonal implants come in slightly lower at about 75%, though this varies by the specific device. Injectable contraception (the shot) tends to have the longest delay because the hormones take more time to clear from your body, with a 12-month pregnancy rate around 78%.
If you’re on the shot and planning a pregnancy in the near future, it’s worth factoring in a longer transition window. For pills and IUDs, stopping a few months before you want to conceive gives your cycle time to regulate and lets you track your natural pattern.
Your Partner’s Health Matters Too
Sperm quality is affected by many of the same lifestyle factors that influence female fertility, and sperm take about three months to fully develop. That means changes your partner makes now won’t show up in sperm quality for roughly 10 to 12 weeks.
Weight is a factor: higher BMI in men is linked to lower sperm count and reduced sperm motility. Smoking is associated with lower counts as well. Heavy alcohol use has a similar effect. Heat exposure matters in a way that’s unique to male fertility. Frequent use of hot tubs and saunas, prolonged sitting, and tight underwear can raise scrotal temperature enough to impair sperm production. Loose-fitting underwear and taking breaks from long periods of sitting are simple adjustments.
Workplace chemical exposure is worth evaluating too. Pesticides, heavy metals, and industrial solvents can affect sperm quality. Protective equipment and minimizing direct skin contact make a difference for partners who work around these substances.
Build Healthy Habits You Can Sustain
Regular physical activity before pregnancy improves cardiovascular fitness, helps manage weight, and reduces stress, all of which support both fertility and a healthier pregnancy. Aim for about 150 minutes of moderate activity per week, the same general guideline that applies to all adults. Walking, swimming, cycling, and yoga are all good options. The point isn’t to train intensely but to build a baseline of fitness that carries into pregnancy, when your body’s demands increase significantly.
Sleep and stress management also play a role. Chronic stress can suppress reproductive hormones in both men and women. There’s no single fix for stress, but consistent sleep schedules, regular movement, and reducing commitments where possible all help create a more favorable environment for conception. Think of the preconception period as a three-to-six-month runway: long enough to make meaningful changes, short enough to stay focused.