The neural tube — the structure that becomes the brain and spinal cord — closes by about the sixth week of pregnancy, often before the first missed period is a week old. The organs are laid down in the first trimester. Which means the conditions that matter most — the folic acid in your system, the medications in your bloodstream, how well a chronic condition is controlled — are set before conception, not after the positive test. This guide walks through everything a preconception visit covers, and then hands you the deliverable: a doctor-visit-ready checklist, in three printable lists, so nothing gets left to memory in a fifteen-minute appointment.

Why one appointment, months early, changes outcomes

A preconception checkup is exactly what it sounds like: a visit with a family doctor, nurse practitioner, or midwife before you start trying, dedicated to getting your health ready for a pregnancy. The Public Health Agency of Canada and the SOGC both treat it as standard, recommended care — not an extra for the anxious. And yet it may be the least-booked appointment in the whole journey, partly because nobody tells you it exists, and partly because it feels presumptuous to see a doctor about a baby that isn’t even a plan yet. It isn’t presumptuous. It’s the single most efficient hour of the entire process.

Booking it is undramatic. Call your clinic and say: “I’d like to book a preconception checkup — I’m planning to try for a pregnancy in the next several months.” That one sentence tells the office how much time to book and tells the provider what the visit is for. If it helps, ask for a longer slot; there’s a fair amount to cover, though it can also be split over two ordinary visits. Aim for three to six months before you want to start trying. That window isn’t arbitrary — it’s the lead time the checklist actually needs: folic acid works best with two to three months of buildup, live vaccines need a buffer before conception, medication switches need time to stabilize, and chronic-condition tuning is measured in months, not days.

The most important weeks of a pregnancy happen before most people know they’re pregnant. A preconception visit moves your care into those weeks.

What does the appointment cover? A good one walks through six territories: your supplement plan (folic acid, mostly), your immunization history, every medication and supplement you take, any chronic conditions, your lifestyle file (alcohol, smoking, caffeine, cannabis, sleep, weight — handled as logistics, not judgment), and your history — cycles, past pregnancies, family conditions on both sides. It usually ends with a blood pressure check, possibly some bloodwork, and a plan. Each of those territories gets its own section below, so you walk in already knowing the map.

Folic acid — the one near-universal instruction

If you take only one thing from this entire guide, take this: Health Canada recommends that anyone who could become pregnant take a daily multivitamin containing 0.4 mg (400 micrograms) of folic acid — beginning at least two to three months before conception, and continuing through pregnancy. Not from the day of the positive test. Before. Folic acid dramatically reduces the risk of neural tube defects like spina bifida, and the protection matters most in those earliest weeks — precisely the ones that pass before most pregnancies are discovered.

The reason for the head start is simple biology: your body’s folate stores build up gradually, and the neural tube closes by around week six. Starting early means the protection is already in place on day one. This is also why the recommendation covers anyone who could become pregnant, not just those actively trying — roughly half of pregnancies in Canada are unplanned, and folic acid can’t help retroactively. A standard prenatal multivitamin covers it (and typically adds the 16–20 mg of iron Health Canada recommends for pregnancy); a plain folic-acid tablet plus a regular multivitamin works too. Food folate — leafy greens, legumes, fortified grains — is genuinely good, but Canadian guidance is clear that food alone isn’t a reliable way to reach the protective level, which is why the supplement is the recommendation.

Now the nuance, and it’s worth stating carefully: some people need more than 0.4 mg, and that decision belongs to a provider. Situations that can warrant a higher prescription dose include a previous pregnancy affected by a neural tube defect, a close family history of one, some medications (certain anti-seizure drugs interfere with how the body uses folate), diabetes, and a few other health circumstances. If any of those sound like you, that’s a first-visit question — write it on the Ask list. What you shouldn’t do is round up on your own. Health Canada is explicit that you shouldn’t exceed 1 mg daily without talking to your provider; more is not automatically better, and high doses can mask a B12 deficiency.

The vaccination review — before, not during

Here is a genuine now-or-later fork, and it’s the reason immunity gets checked at the preconception visit rather than the first prenatal one: two of the infections most dangerous to a fetus — rubella (German measles) and varicella (chickenpox) — are prevented with live vaccines, and live vaccines are generally not given during pregnancy. If you arrive at pregnancy without immunity, the fix has to wait until after the birth. Check before, and the fix is a simple shot with time to spare.

The check itself is easy. Your provider can order a blood test for rubella immunity, and for varicella either take a history (a clear case of childhood chickenpox, or two documented doses of vaccine, generally settles it) or test your blood. If you’re not immune to either, you get vaccinated — MMR for rubella, the varicella vaccine for chickenpox — and then wait at least four weeks before trying to conceive, per the Canadian Immunization Guide. That four-week buffer is exactly the kind of scheduling detail that makes the three-to-six-month head start worth it. If you grew up outside Canada, flag it: immunization schedules differ by country and era, and your provider may want a broader look at your records.

The rest of the vaccine file is about updates rather than urgency. Tetanus-diphtheria boosters are due every ten years — easiest to top up now. A Tdap dose (which adds whooping-cough protection for your future newborn) is recommended in every pregnancy, ideally between 27 and 32 weeks — that one is deliberately given during pregnancy, so it goes on the “know for later” list, not the “do now” list. Influenza and COVID-19 vaccines are inactivated or non-live, recommended for pregnant people, and can be given before or during pregnancy — so simply stay current. The preconception visit is the natural moment to lay this whole timeline out with your provider.

The medication & supplement audit

Before the visit, make one complete list: every prescription you take, every over-the-counter medication you reach for regularly, every supplement, every herbal product. All of it, with doses. Then bring the list to your prescriber or pharmacist and ask one question: “I’m planning a pregnancy — does anything here need a plan?” This is the audit, and there are two rules that govern it.

Rule one: never stop a medication on your own because you’re trying to conceive. It feels protective; it frequently isn’t. Untreated conditions — depression, epilepsy, high blood pressure, thyroid disease — carry their own real risks to a pregnancy, and stopping some medications abruptly is dangerous in itself. Rule two: start the audit early, because when a medication does need changing, the safe path is usually a supervised switch to a pregnancy-compatible alternative, and switches take time to test and stabilize. Months, sometimes. This section is a large part of why the preconception visit exists at all.

A medication that keeps you well is part of a healthy pregnancy, not automatically a threat to one. The move is never “stop” — it’s “ask.”

Without playing doctor — that’s your prescriber’s job — it’s fair to name the categories that most often need a preconception plan, so you know to flag them:

• Acne retinoids.Oral isotretinoin is a major one — it causes serious birth defects, must be fully stopped before conception, and comes with its own formal pregnancy-prevention program and washout period. Your prescriber will map the timeline. Topical retinoids are also typically stopped; ask.
• Some anti-seizure medications.A few, valproate most prominently, carry meaningful risks in pregnancy — and epilepsy still needs treating. Neurologists plan these switches routinely, but they want the runway. This is also one of the situations where higher-dose folic acid enters the conversation.
• Some blood-pressure medications.Certain common classes (ACE inhibitors and ARBs among them) are swapped for pregnancy-compatible options. The condition keeps being treated; the molecule changes.
• High-dose vitamin A.Too much preformed vitamin A (retinol) — think high-dose supplements or daily liver products, not ordinary food — is linked to birth defects. Check your supplement labels and bring them to the audit.
• And a longer quiet list.Some blood thinners, some mood stabilizers, methotrexate, some migraine medications, and plenty of “natural” herbal products that have never been tested in pregnancy. Which is the point: the audit covers everything on your list, not just the famous names.

Chronic conditions: tuned first, not managed later

If you live with an ongoing condition, the preconception window is where some of the highest-stakes work happens — and “work” usually means tuning, not overhauling. The pattern across conditions is the same: a condition that enters pregnancy well-controlled behaves far better than one that gets attention only after the positive test. A few of the big ones, in plain terms:

• Diabetes (type 1 or 2).The clearest case in the evidence. High blood sugar around conception and in the first weeks raises the risk of birth defects and complications — and tightening control before conception measurably lowers it. Your care team will set target glucose and A1C numbers for you, possibly adjust medications, and likely raise the folic-acid question. This tuning takes months; it is the textbook reason for the head start.
• Thyroid conditions.Thyroid hormone matters for early fetal brain development, and pregnancy changes the body’s demand for it — people on levothyroxine often need dose adjustments. Preconception is when your provider checks your levels, optimizes the dose, and tells you when to retest once you conceive.
• High blood pressure.Two jobs: get the pressure itself well-controlled, and make sure the medication doing it is pregnancy-compatible (see the audit above). Entering pregnancy with both settled changes how the whole nine months are monitored.
• Asthma, autoimmune conditions, kidney disease, and the rest.The same logic applies — stable and treated beats unstable and untreated, essentially always. For some autoimmune conditions, timing conception to a quiet stretch of disease activity is part of the plan. If you see a specialist, tell them you’re planning a pregnancy; that sentence changes decisions.

Mental health belongs on this list as a full citizen, and it deserves its own careful paragraph. If you take an antidepressant or other psychiatric medication, the pull to quit “for the baby” can be strong — and quitting solo is precisely the wrong move. Stopping an SSRI abruptly can cause discontinuation symptoms and, more importantly, invites relapse — and untreated depression or anxiety in pregnancy carries genuine risks of its own, for you and for the pregnancy. Many people, with their prescriber, decide that staying on their medication is the plan; others taper or switch under supervision, slowly, with time to confirm they’re still well before trying. There is no version of this decision that’s better made alone. Book the conversation with whoever prescribes — months out — and treat protecting your mental health as part of preparing your body, because it is.

The lifestyle file, without the lecture

This is the part of preconception advice that usually arrives dipped in guilt, so let’s set the tone first: none of this is a moral inventory. It’s a short list of exposures with real evidence behind them, handled the way you’d handle any other logistics — early, practically, and with support where support exists.

• Alcohol.The Canadian guidance is straightforward: there’s no known safe amount of alcohol in pregnancy — or when you’re trying to become pregnant, since the earliest weeks pass before you know. The practical move is to wind down drinking when you start trying, not at the positive test. If stopping feels harder than you expected, that’s worth a judgment-free conversation with your provider now, not later.
• Smoking & vaping.Quitting is the single biggest lifestyle upgrade on this list — for fertility, for pregnancy, and for the eventual small roommate. It’s also genuinely hard, which is why Canada has built real supports: every province runs a free quitline (the pan-Canadian number is 1-866-366-3667), and counselling plus quit aids beats willpower alone. Preconception is also the moment to ask your provider which quit aids fit your situation. Vaping isn’t a safe harbour in pregnancy either — fold it into the same plan.
• Caffeine.Nobody is taking your coffee. Health Canada’s guidance for pregnancy is to keep caffeine under about 300 mg a day — roughly two 8-oz cups of coffee — counting tea, cola, energy drinks, and chocolate. Trying-to-conceive is a sensible time to drift toward that number so it isn’t a cliff later. Note that energy drinks concentrate caffeine fast, and some herbal teas aren’t recommended in pregnancy — ask rather than assume.
• Cannabis.Legal is not the same as safe here. Health Canada’s guidance is that the only safe amount in pregnancy is zero, and that cannabis can affect fertility for both partners while you’re trying. If you use it for sleep, anxiety, or pain, don’t just white-knuckle the gap — tell your provider what it was doing for you and build a replacement plan.
• Weight, framed usefully.Body size on its own is a poor conversation and a worse plan. What the evidence supports is quieter: stable habits — regular movement you’ll actually keep doing, food that follows the boring good advice, decent sleep — improve fertility and pregnancy outcomes across body sizes. If a provider raises weight, it should be with a plan attached; crash dieting right before conceiving is its own problem, not a preparation strategy. You deserve care that starts from where you are.

One more honest note: perfection is not on the checklist. If you’re reading this having drunk wine last weekend or still smoking, you have not wrecked anything — you’ve identified the items on your list with lead time to work on them. That is what the lead time is for.

The often-forgotten four

Four items that rarely make it into anyone’s mental model of “getting ready,” and belong on the list all the same.

1. The dental visit

Book a cleaning and a checkup now. Gum disease is common, gets worse in pregnancy, and has been associated in research with some pregnancy complications — but the practical argument is simpler: dental problems are just easier to fix before pregnancy, when X-rays, freezing, and any needed work are uncomplicated decisions rather than trimester math. If you’ve been putting off a filling, this is its moment.

2. The carrier-screening conversation

Everyone carries a few silent, recessive gene variants; when both partners happen to carry variants in the same gene, each pregnancy has a chance of a child affected by that condition. Carrier screening is a blood or saliva test that checks for this before it’s a surprise, and Canadian guidance — a joint SOGC and Canadian College of Medical Geneticists opinion — says the conversation should be offered to everyone planning a pregnancy. What you’re actually offered varies: screening tied to family history or ancestry-linked risk is generally covered; broader “expanded” panels are usually private-pay, offered through clinics and labs at varying prices. You don’t have to want the test. You just deserve the conversation — and preconception is when it’s most useful, because it’s when the information leaves you the most options. Put it on the Ask list, and bring whatever you know of both families’ health histories.

3. The other half of the biology

If a partner’s sperm is involved in this project, their health is on the checklist too — a fact that the entire cultural script of “pregnancy prep” manages to ignore. Sperm are made fresh on a roughly three-month cycle, which means the same three-month window applies to them. The levers are unglamorous but real: heat (testicles run cooler than body temperature on purpose — regular hot tubs and saunas work against that), alcohol, smoking and vaping, cannabis (Health Canada flags fertility effects for both partners), and medications — including, counterintuitively, testosterone supplements, which can shut sperm production down, and a few other prescriptions worth a pharmacist’s glance. None of this requires a lifestyle overhaul; it mostly requires the partner doing their own small audit in the same window you’re doing yours.

4. Start tracking your cycle

Starting now, note the first day of each period — an app, a calendar, a note on your phone; the technology doesn’t matter. Three or four months of dates does two useful things. It teaches you your own pattern (which makes the timing conversations in the next article of this series much easier), and it hands your provider real information: a typical cycle length, and an early flag if your cycles are consistently irregular, very long, or very short — which is worth mentioning at the visit rather than discovering after a year of trying. When a pregnancy does happen, that same humble list is what dates it accurately.

The checklist to bring — Ask, Check, Update

Everything above, folded into the thing you actually came for: three lists sized for a real appointment. Ask is what you say; Check is what gets looked at; Update is the to-do list that starts before the visit and finishes after it. Print this section (or screenshot the tables), strike out what doesn’t apply to you, and add your own rows — the blank margin is part of the tool. If your appointment is short, hand the provider the Ask list and let it drive; a good fifteen-minute visit can cover most of it and book the follow-up for the rest.

1. Public Health Agency of Canada, “Folic acid, healthy pregnancy and neural tube defect prevention” — 0.4 mg daily for anyone who could become pregnant; start at least 2–3 months before conception; higher doses only with a provider (Reviewed Jul 2026)
2. Public Health Agency of Canada, “Chapter 2: Preconception care,” Family-Centred Maternity and Newborn Care: National Guidelines — Scope and content of the preconception visit (Reviewed Jul 2026)
3. Canadian Immunization Guide, Part 3, “Immunization in pregnancy and breastfeeding” — Live vaccines (MMR, varicella) before pregnancy with a 4-week interval; inactivated vaccines in pregnancy (Reviewed Jul 2026)
4. National Advisory Committee on Immunization, “Update on immunization in pregnancy with Tdap vaccine” — Tdap in every pregnancy, ideally 27–32 weeks (Reviewed Jul 2026)
5. Health Canada / PHAC, “Your Guide to a Healthy Pregnancy” — Caffeine under 300 mg/day; alcohol — no known safe amount in pregnancy or while trying (Reviewed Jul 2026)
6. Health Canada, “Is cannabis safe during preconception, pregnancy and breastfeeding?” — No known safe amount in pregnancy; fertility effects for both partners (Reviewed Jul 2026)
7. Joint SOGC–CCMG Opinion, “Reproductive Genetic Carrier Screening” — The carrier-screening discussion should be offered to all planning a pregnancy (Reviewed Jul 2026)
8. Society of Obstetricians and Gynaecologists of Canada, PregnancyInfo.ca — “Before you conceive” — Preconception health, vaccination, and lifestyle guidance (Reviewed Jul 2026)
9. Health Canada, Canada’s Food Guide — “Nutrition considerations during pregnancy” — Daily multivitamin with 0.4 mg folic acid and 16–20 mg iron (Reviewed Jul 2026)