Preparing for pregnancy ideally starts three to six months before you begin trying to conceive. That window gives you enough time to address nutritional gaps, update vaccinations, adjust medications, and make lifestyle changes that meaningfully improve your chances of a healthy pregnancy. Here’s what to focus on.
Schedule a Preconception Checkup
A preconception visit is different from a routine physical. Your provider will review your medical history, your partner’s medical history, and your family histories to flag potential pregnancy risks. This is the appointment where you’ll discuss any chronic conditions, current medications, and past pregnancy complications. It’s also when your provider will order blood work and any screenings relevant to your situation.
If you have diabetes, this visit is especially important. Several medications commonly used to manage diabetes and its complications are unsafe during pregnancy and need to be swapped out before you conceive. The same goes for certain blood pressure medications. Your provider will want your blood sugar well controlled before conception, with targets tighter than the usual non-pregnancy range.
If you have high blood pressure, thyroid disease, epilepsy, or any other chronic condition, the goal is the same: get the condition as stable as possible and switch to pregnancy-safe medications before you start trying.
Start Folic Acid Early
Folic acid is the single most important supplement to begin before pregnancy. It prevents neural tube defects, which develop in the first few weeks after conception, often before you even know you’re pregnant. The standard recommendation is 400 micrograms daily, starting at least one month before conception. Many prenatal vitamins contain this amount, so switching to a prenatal vitamin a few months early covers this base along with iron, calcium, and other nutrients that support early fetal development.
Check Your Vaccination Status
Certain vaccines cannot be given during pregnancy because they contain live virus. Measles, mumps, and rubella (MMR) and varicella (chickenpox) are the two most relevant ones. If a blood test shows you’re not immune to rubella or chickenpox, you’ll need the vaccine before conceiving, and you should wait at least 28 days after an MMR shot and one month after a varicella shot before trying to get pregnant. This is a common reason to start planning a few months ahead rather than just stopping birth control and hoping for the best.
Consider Carrier Screening
Carrier screening is a blood test that tells you whether you carry gene mutations for certain inherited diseases, even if you’re perfectly healthy yourself. If both you and your partner carry the same mutation, there’s a chance your child could be affected.
The American College of Obstetricians and Gynecologists recommends that all women considering pregnancy be offered screening for cystic fibrosis and spinal muscular atrophy. Additional screening is recommended based on ethnicity and family history. For example, Tay-Sachs screening is recommended if either partner is of Ashkenazi Jewish, French-Canadian, or Cajun descent. A complete blood count can also flag whether you may carry a gene for certain blood disorders like sickle cell disease or thalassemia. Doing this before pregnancy gives you time to understand the results and explore your options.
Plan Your Transition Off Birth Control
How quickly your fertility returns depends on the type of contraception you’ve been using. Research from Boston University found that IUD users and implant users had the shortest wait, averaging about two menstrual cycles before normal fertility returned. Pill and vaginal ring users averaged three cycles. Patch users averaged four cycles. Injectable contraceptives had the longest delay, averaging five to eight cycles before ovulation returned to normal.
These delays are temporary for all methods, but they’re worth factoring into your timeline. If you’ve been on injectable contraceptives, you may want to stop several months before you hope to conceive. Tracking your cycles after stopping (using an app, basal body temperature, or ovulation test strips) helps you identify when ovulation resumes and gives you useful information to share with your provider if conception takes longer than expected.
Reach a Healthy Weight
Body weight affects both your ability to conceive and the health of your pregnancy. Research shows that women with a BMI in the normal range (roughly 18.5 to 24) have the easiest time getting pregnant, with the highest probability of conception falling around a BMI of 20 to 22. Being overweight is associated with longer time to conception, and obesity increases the risk of gestational diabetes, preeclampsia, and cesarean delivery. Being significantly underweight carries its own risks, including irregular ovulation and low birth weight.
If your weight is outside the healthy range, even modest changes make a difference. Losing 5 to 10 percent of body weight can restore regular ovulation in many women who aren’t ovulating consistently, and gaining a few pounds can do the same for those who are underweight.
Adjust Your Diet and Habits
Alcohol has no established safe level during pregnancy, and because many women don’t realize they’re pregnant for several weeks, the safest approach is to stop drinking when you start trying. Caffeine is more forgiving: keeping intake under 200 milligrams per day (roughly one 12-ounce cup of coffee) is not associated with increased miscarriage risk or preterm birth. Above that threshold, the risks begin to climb.
Smoking is one of the clearest things to quit. It reduces fertility in both women and men, increases miscarriage risk, and is linked to low birth weight and preterm delivery. If your partner smokes, secondhand exposure matters too. Quitting a few months before conception gives your body time to recover some of the damage.
Reduce Exposure to Environmental Toxins
Certain chemicals in everyday products can disrupt hormones and impair fertility. The most common offenders include bisphenols (found in some plastics and can linings), phthalates (found in fragranced products, vinyl, and some personal care items), and pesticides. Heavy metals like lead, mercury, cadmium, and arsenic also harm reproductive health and fetal development.
Practical steps include switching to glass or stainless steel food containers, choosing fragrance-free personal care products, eating organic produce when possible (or thoroughly washing conventional produce), and avoiding handling pesticides or herbicides. If your job involves exposure to chemicals, radiation, or heavy metals, talk to your provider about workplace safety and whether any modifications are needed before you conceive.
Your Partner’s Health Matters Too
Sperm quality is shaped by many of the same lifestyle factors that affect female fertility. Smoking lowers sperm count. Heavy alcohol use reduces sperm quality. Chronic stress disrupts the hormones needed to produce healthy sperm. Heat is another factor: frequent use of saunas, hot tubs, or tight-fitting underwear can raise scrotal temperature enough to impair sperm production. Switching to loose-fitting underwear and avoiding prolonged heat exposure are simple changes that can help.
Sperm take about 70 to 90 days to develop, so lifestyle improvements your partner makes now won’t fully show up in sperm quality for two to three months. That’s another reason to start the preconception process well before you plan to conceive.