Preparing your body for pregnancy ideally starts three to six months before you try to conceive. That window gives you time to build up nutrient stores, address any health issues, and create the best possible environment for a developing baby. The steps below cover what matters most, from supplements and screenings to changes your partner can make too.
Start Folic Acid Before You Conceive
Folic acid is the single most important supplement to begin early. It helps prevent neural tube defects, which are serious abnormalities of the brain and spine that develop in the first few weeks of pregnancy, often before you even know you’re pregnant. The standard recommendation for average-risk women is 400 micrograms per day. Women who have had a previous pregnancy affected by a neural tube defect, or who take seizure medications, need a much higher dose of 4 milligrams daily.
Most prenatal vitamins contain 400 to 800 micrograms of folic acid, so switching to a prenatal formula is the simplest way to cover this base. Beyond folic acid, a good prenatal also supplies iron, calcium, and vitamin D, all of which your body will need in higher amounts during pregnancy. Starting your prenatal at least one month before conception is the minimum, but three months is better for building reserves.
Get to a Healthy Weight
Weight has a direct effect on ovulation. Women with a BMI above 27 have roughly 2.4 times the risk of anovulatory infertility (not releasing eggs regularly) compared to women in the normal BMI range of 18.5 to 24.9. That risk climbs steadily: at a BMI of 30 to 32, the risk is about 2.7 times higher. Being significantly underweight can also disrupt your cycle.
The hormonal picture behind this is straightforward. Excess body fat, particularly around the midsection, drives insulin resistance. Higher insulin levels push the ovaries to produce more androgens (male-type hormones), which interfere with the signals that trigger ovulation. Women with obesity who do ovulate still tend to have shorter luteal phases (the second half of the cycle) and lower progesterone, both of which make it harder for a fertilized egg to implant. Even a modest weight loss of 5 to 10 percent can restore more regular cycles for many women. If you’re underweight, gaining to a healthy range can have a similarly positive effect on ovulation.
Schedule a Preconception Checkup
A visit with your doctor before you start trying gives you a chance to catch problems that are much easier to manage before pregnancy than during it. Key things to cover include:
- Rubella immunity. Rubella infection during pregnancy can cause serious birth defects. Most people were vaccinated as children with the MMR vaccine, but if you haven’t had both doses or your records are unclear, a blood test can check your immunity. If you need the vaccine, you should wait at least four weeks after receiving it before trying to conceive.
- Genetic carrier screening. If you or your partner have a family history of inherited blood disorders like sickle cell disease or thalassaemia, a simple blood test can determine whether you carry the gene. Knowing your carrier status before pregnancy lets you plan and make informed decisions.
- Chronic conditions. Diabetes, thyroid disorders, high blood pressure, and autoimmune diseases all benefit from being well-controlled before conception. Your doctor may need to adjust treatment plans or switch medications.
Review Your Medications
Some common medications can cause serious harm to a developing baby, and several need to be stopped or changed well before you conceive. This is one of the most important reasons to talk to your doctor early.
Isotretinoin, used for severe acne, carries a high risk of birth defects and miscarriage and is strictly off-limits during pregnancy. ACE inhibitors, a common class of blood pressure drugs, can damage fetal kidneys and cause other defects, especially in the second and third trimesters. Certain beta-blockers have been linked to slow fetal heart rate and growth restriction. Among psychiatric medications, lithium is associated with heart malformations when taken in the first trimester, and paroxetine (a common antidepressant) carries an increased risk of cardiac defects. Other antidepressants like sertraline and fluoxetine have lower risk but can still cause withdrawal symptoms in newborns when taken late in pregnancy.
Never stop a medication on your own. Your doctor can help you weigh the risks and find safer alternatives so that both you and a future pregnancy stay healthy.
Take Care of Your Teeth
This one surprises many people, but gum health matters for pregnancy. Periodontal disease, the advanced form of gum inflammation, has been linked to preterm birth and low birth weight. Pregnancy hormones also make your gums more vulnerable to inflammation, so starting with a healthy mouth puts you ahead. Schedule a dental cleaning and address any cavities or gum issues before you conceive.
Reduce Exposure to Hormone-Disrupting Chemicals
Certain chemicals commonly found in household products can interfere with reproductive hormones. Phthalates, which are frequently used in fragranced products like air fresheners, scented candles, and some personal care items, are known hormone disruptors. Bisphenol-A (BPA), found in some hard plastics marked with recycling code #7, is another one. Flexible vinyl plastics (PVC, code #3) often contain phthalates as well, and polystyrene (#6) contains styrene.
You don’t need to overhaul your entire home, but a few practical swaps help. Choose fragrance-free personal care products when possible. Store food in glass or stainless steel instead of plastic, especially for heating. Avoid microwaving food in plastic containers. Check recycling codes on plastic items and replace #3, #6, and #7 where you can.
Know Your Fertile Window
Once you’re ready to start trying, understanding the timing of fertility makes a real difference. An egg survives less than 24 hours after ovulation, and the highest pregnancy rates occur when sperm meets the egg within four to six hours of release. Sperm, however, can survive inside the reproductive tract for up to five days. This means having sex in the days leading up to ovulation is just as important as the day itself.
For a typical 28-day cycle, ovulation usually happens around day 14, and health providers recommend having sex between days 7 and 20 to cover the full fertile window. Ovulation predictor kits, which detect a hormone surge in your urine, can help you pinpoint when you’re about to ovulate. Tracking your basal body temperature or cervical mucus patterns can also be useful, though these methods confirm ovulation after the fact rather than predicting it.
Plan for Coming Off Birth Control
The timeline for fertility return depends on which method you’ve been using. With the pill (both regular and low-dose), you can get pregnant right away after stopping. The same is true for both copper and hormonal IUDs: fertility typically returns with the first menstrual cycle after removal.
The major exception is the injectable shot (Depo-Provera). It can take anywhere from 3 to 18 months after your last shot for fertility to return. If you’re on the shot and planning a pregnancy in the near future, it’s worth switching to a different method well in advance to avoid a long wait.
Your Partner’s Health Matters Too
Sperm quality is shaped by the same lifestyle factors that affect the rest of the body, and it takes about three months for new sperm to fully develop. That means changes your partner makes now will show up in sperm quality roughly a quarter later.
Weight matters on this side too. A higher BMI in men is linked to lower sperm count and reduced sperm movement. Smoking lowers sperm count, and heavy drinking reduces both count and testosterone levels. Heat is a less obvious factor: tight underwear, prolonged sitting, and regular sauna or hot tub use can raise scrotal temperature enough to impair sperm production. Switching to loose-fitting underwear and taking breaks from sitting are simple fixes.
Exposure to pesticides, lead, and other workplace toxins can also hurt sperm quantity and quality. If your partner works around chemicals, proper protective equipment becomes especially important during this time. Even stress plays a role, both by lowering libido and by affecting the hormones involved in sperm production. One practical note: many common lubricants can interfere with sperm movement. If you need lubrication, look for products specifically designed for conception, or use natural options like mineral oil or canola oil.
Build Healthy Habits That Will Carry You Through
Beyond the specific checklist items, the preconception period is a good time to build routines that will serve you throughout pregnancy. Regular moderate exercise improves circulation, helps maintain a healthy weight, and reduces stress. Aim for at least 150 minutes a week of activities like walking, swimming, or cycling. If you don’t currently exercise, starting now means you’ll already have an established routine when pregnancy begins.
Cut out alcohol entirely once you start trying. There is no known safe amount during pregnancy, and since you won’t know you’re pregnant for the first few weeks, stopping early eliminates the risk during that critical window. If you smoke, quitting before conception is one of the most impactful things you can do. Smoking reduces fertility, increases miscarriage risk, and is linked to preterm birth, low birth weight, and a host of other complications. Limit caffeine to moderate amounts, generally under 200 milligrams a day (roughly one 12-ounce cup of coffee).
Focus on a nutrient-dense diet rich in leafy greens, whole grains, lean protein, and healthy fats. Folate from food (found in spinach, lentils, and fortified cereals) complements your supplement. Iron-rich foods like red meat, beans, and fortified grains help build the blood volume your body will need. These aren’t dramatic changes for most people, just a shift toward consistently eating well rather than perfectly.