Preparing for pregnancy: a health checklist

What planning a pregnancy actually consists of

Approaching pregnancy deliberately helps reduce the risk of complications. Guidance suggests starting preparation roughly 3–6 months before conception — not because the body needs that long to "clear out", but because some things simply take months to measure: a test, a result, a correction, another test.

The limit of this article, stated up front: what follows is a list of what usually gets discussed at a pre-pregnancy appointment. It is not a prescription and not a plan of investigations. What you specifically need is decided by a clinician, which is why every point below is written as a topic for a conversation rather than as an instruction.

Why "3–6 months"

The figure looks arbitrary until you look at what it is made of.

• Folic acid needs to have built up before the neural tube forms — and that is the first few weeks, when a pregnancy is often not yet known about.
• Deficiencies (iron, vitamin D, iodine) are found by testing and corrected over months, not days.
• Chronic conditions — thyroid, diabetes, blood pressure, epilepsy — need to be stable before pregnancy, and adjusting treatment takes time too.
• Vaccinations — some are not given during pregnancy, so questions of immunity are settled in advance.
• Dentistry — treatment is easier to finish before rather than during.

So three months is not a waiting period. It is a period in which something has time to happen.

1. Folic acid

Folic acid (vitamin B9) is critical in preventing neural tube defects.

• What the guidance says: the WHO and the NHS recommend 400 micrograms daily — from at least a month before conception and on through the first trimester.
• Why before conception: the neural tube closes in the first weeks, often before a test shows two lines. Starting afterwards means starting after that process has already happened.
• Why this is not a prescription for you: some people need a different dose — for example where there is a family history of neural tube defects, or with diabetes, epilepsy or certain medicines. Kvit does not prescribe and does not name your dose — that is a clinician's decision.

Worth knowing separately: folate from food — dark green vegetables, pulses, broccoli, citrus, fortified breakfast cereals — is good for you, but the guidance recommends a supplement, because reaching the required amount reliably every day through food alone is difficult. And one warning that often gets left out: liver is indeed rich in folate, but the NHS puts it on the list of foods to avoid in pregnancy, because of its vitamin A content.

2. The conversation with a clinician

When planning a pregnancy, a check-up usually covers:

• a full blood count;
• thyroid function (TSH, and free T4 if needed);
• whether you have had two doses of MMR — that is how rubella is covered here, rather than by an immunity test;
• vitamin D and iron levels;
• dental health (treatment is easier to finish before pregnancy);
• medicines you take regularly.

This is not a list of tests "you have to have": what you specifically need is decided by a clinician — some people will need more, some less.

The last point deserves particular attention. Some routine medicines — for blood pressure, for acne, for epilepsy, certain antibiotics — are incompatible with pregnancy or need substituting. That is exactly the topic to raise in advance, rather than after a positive test. Stopping prescribed medicines on your own is not the answer either — that is equally a clinician's decision.

3. Lifestyle

• Alcohol and nicotine affect the fertility of both partners. Guidance names no safe level of alcohol during pregnancy, so the simplest marker is to stop at the planning stage.
• Food: guidance suggests paying attention to iron, calcium and protein. This is not about dieting but about what a normal day's eating contains.
• Weight: both higher and lower weight can affect ovulation. What that means in your case is a question for a clinician, not for a calculator.
• Caffeine: guidance usually suggests limiting rather than eliminating. The NHS names a figure for pregnancy — no more than 200 mg a day, roughly two mugs of instant coffee. Whether that already applies to you at the planning stage is a question for a clinician.
• Movement: moderate regular activity is good at the planning stage. Sharply increasing training load, by contrast, can shift a cycle.
• Sleep: chronic sleep deprivation affects the cycle for real, and it is one of the few things you can change without anyone's help.

4. Your partner is half the question too

This part is often forgotten, although skipping it means preparing only half of the picture.

Sperm take roughly three months to mature. Which means changes in a partner's lifestyle show up in the numbers not immediately, but with that same lag of a few months — exactly the period the article opened with.

What usually gets discussed: alcohol and nicotine, overheating (saunas, long hot baths), medicines taken regularly, and general health. If pregnancy does not happen after a year of regular trying, both partners are investigated — that is the standard approach, not an exception.

5. What cycle records give you

The practical part, where an app genuinely counts for something.

To plan, you need to know two things: your usual cycle length and how much it varies. Neither can be recalled from memory six months later — they can only be read from records.

Useful to have before an appointment:

• the first day of every period over the past few months;
• length and heaviness;
• anything unusual: bleeding between periods, severe pain;
• basal body temperature if you measure it — that is what shows your luteal phase length.

On how a fertile window is calculated from this data and why "day 14" does not suit everyone, see How ovulation is actually calculated.

How long this usually takes

A question asked less often than it is thought about.

Guidance describes it as normal for pregnancy to happen within a year of regular trying. Which means a few months without a result is an expected course of events, not a signal. The threshold after which it is worth seeing a clinician is usually given as a year — or six months if you are 35 or older.

Knowing that marker is useful for a practical reason: it saves you both from premature worry in the third month and from waiting too long into the second year.

When to see a clinician sooner

• pregnancy has not happened after a year of regular trying (or six months if you are 35 or older);
• irregular cycles, or no period for several months at a time;
• previous pregnancy losses;
• a chronic condition or regular medication;
• severe period pain that gets in the way of ordinary life;
• or simply if you want to prepare and do not know where to start — that is reason enough for an appointment.