How long does it take to get pregnant? What's typical month by month

Short answer

How long does it take to get pregnant? For most couples, somewhere between one and twelve months, with the odds front-loaded: the American Society for Reproductive Medicine (ASRM) states that "approximately 80% of couples will conceive in the first 6 months of attempting pregnancy" (2). In a German prospective study of couples timing sex to the fertile window, the cumulative chance of conception was 38% after one cycle, 68% after three, 81% after six and 92% after twelve (3). Age shifts those numbers, mostly the woman's, and mostly from the mid-thirties on (4).

If you have had two or three negative tests and are starting to wonder what is wrong with you: in most cases, nothing. Even at peak fertility, more cycles end without a pregnancy than with one. A few months without a positive test is how human reproduction usually looks, and it is not your fault.

Note: this article explains what research and professional guidelines say and is not medical advice. It cannot tell you what is happening in your body. Severe pain in the abdomen, pelvis or shoulder, fainting, or heavy bleeding — especially if you might be pregnant — needs care right away, not a calendar.

How long does it take to get pregnant on average?

On average, a little over a third of couples who time sex well conceive in the first cycle, about two-thirds within three, most within six, and the large majority within a year (3). ASRM summarizes it this way: the likelihood of conception "is generally highest in the first few months of unprotected intercourse and declines gradually thereafter," and monthly fecundability — the chance of pregnancy per cycle — "is greatest in the first 3 months" (2).

That does not mean your body becomes less fertile with each month of trying. It reflects who is left: the most fertile couples conceive quickly, so those still trying after six months include more couples with a reason it is taking longer. The German study authors put it directly: "Most couples conceive within six cycles with timed intercourse. Thereafter, every second couple is probably either subfertile or infertile" (3). "Subfertile" means it may take longer, not that it will not happen — about 10% of the couples in that study had not conceived by the end (3). (See also: a month-by-month due date chart.)

Know who was studied. The German figures come from 346 women using natural family planning to time sex to their fertile days (3) — close to ideal timing, so on the optimistic side. PRESTO, a North American cohort of 2,962 couples followed for up to 12 cycles, breaks its figures down by age (4).

The World Health Organization estimates that "approximately one in every six people of reproductive age worldwide experience infertility in their lifetime" (17) — a reason to take a long wait seriously, and a reminder that five in six do not.

Your chances month by month

Read these as "how many couples like us have conceived by now," not as a forecast for you.

Those figures come from couples who knew when they were ovulating. In PRESTO, where couples were not required to time sex, the cumulative pregnancy proportion after six cycles ranged from 62.0% (women aged 28–30) down to 27.6% (women aged 40–45), and after twelve cycles from 79.3% (women aged 25–27) down to 55.5% (women aged 40–45) (4).

Month three without a positive test is common. ASRM's evaluation checkpoints are 12 months of trying when the woman is under 35 and 6 months from 35 (101971-4)); see the doctor section below.

How long does it take to get pregnant after sex?

Conception itself can happen within hours to a few days of sex, but a pregnancy only becomes measurable about one to two weeks later. The timeline has three steps: sperm reach the egg, the egg is fertilized, and the embryo implants in the uterus. Only after implantation does the body start producing the hormone that pregnancy tests detect.

How long does it take for sperm to reach the egg and get pregnant?

Minutes. ASRM notes that "sperm can be found in the cervical canal seconds after ejaculation, regardless of coital position," and that sperm deposited at the cervix at midcycle "are found in the fallopian tubes within 15 minutes" (2). Getting there is fast. The part that decides whether a pregnancy can start is timing relative to ovulation.

In a landmark study of 221 women who collected daily urine samples, conception "occurred only when intercourse took place during a six-day period that ended on the estimated day of ovulation" (6). The probability per cycle ranged from about 0.10 when sex happened five days before ovulation to 0.33 on the day of ovulation itself (6). In plain terms: sperm can wait in the reproductive tract for several days, but the egg is available only briefly, so the days before ovulation matter, not just the day itself.

How long does it take to get pregnant after ovulation?

If an egg is fertilized, implantation usually follows about a week to a week and a half later. In a study of 189 conceptions detected through daily urine testing, among pregnancies that continued, the pregnancy hormone hCG first appeared 6 to 12 days after ovulation, and 84% implanted on day 8, 9 or 10 (7). In the same study, 25% of those very early conceptions ended in early loss (7) — part of why trying takes several cycles for many healthy couples.

When will a pregnancy test show it?

Later than most people hope. The FDA advises: "For the most reliable results, test 1-2 weeks after you miss your period," and notes that because periods vary and due dates are easy to miscalculate, "10 to 20 pregnant women out of every 100 will not detect their pregnancy on the first day of their missed period" (14). A negative test on the day your period is due is not the final word for that cycle.

And one thing that is not a waiting game: if you could be pregnant and have sudden, severe pain in your abdomen or pelvis, shoulder pain, or weakness, dizziness or fainting, ACOG lists these as possible signs of a ruptured ectopic pregnancy and says to go to an emergency room (15). Call 911 if you cannot get there safely. Earlier, milder signs, such as abnormal vaginal bleeding or pelvic pain, should be reported to your ob-gyn, ACOG adds (15).

How age changes the timeline — for both partners

Female age has the largest effect on how long it takes to get pregnant; male age matters less and later. ASRM states that relative fertility "is decreased by about half at age 40 compared with women in their late 20s and early 30s, the time of peak fertility" (2).

The cohort data show the slope rather than a cliff:

A ratio of 0.60 does not mean a 60% chance of pregnancy; it means the monthly chance is about 60% of the reference group's. Steiner and Jukic also found that, at any age over 30, women who had never been pregnant before had a lower probability of conceiving than women who had (5).

What about the length of the fertile window? An analysis of 782 couples found "no evidence for a shorter fertile window in older men or women" — the window stays about six days; the chance per day within it falls (8).

Male age. The evidence is more mixed. The same analysis found fertility "significantly reduced for men aged >35 years" after controlling for the woman's age (8), while PRESTO found male age "was not associated appreciably with fecundability after adjustment for female age," with too few men over 45 to draw conclusions about older men (4). ASRM's summary: semen parameters decline detectably after 35, but male fertility "does not appear to be appreciably affected before the age of approximately 50" (2). Our guide to preconception for men covers the side of the process that is under a partner's control.

How to get pregnant at 40 fast

There is no shortcut that changes how eggs age, but there is one thing that changes how fast you get answers: the timeline for evaluation. In ASRM's fertility evaluation guidance, "in women >40 years of age, more immediate evaluation and treatment may be warranted" (9). At 40 or older, that wording is a reason to ask a clinician early, when you start trying, whether waiting makes sense for you, and to use the same timing principles everyone else does (below).

How to get pregnant fast: what the evidence supports

The two points with the strongest backing are frequent sex in the six-day fertile window and not smoking. Most of the rest is either unproven or myth. Here is what ASRM's committee opinion on optimizing natural fertility says, point by point (2):

On folic acid, ASRM states that "daily folic acid supplementation in women decreases the risk of neural tube defects in their children" (2) — about the baby's development, not speed of conception. The product and amount are a question for your clinician; we give no doses.

ASRM also notes that fertility tracking can "induce unnecessary stress" for some women (2). If tracking makes sex feel like an appointment, remember the table above: sex two to three times a week works nearly as well.

Next to all of that, keep the red flags. Tracking your cycle is not the right response to pelvic pain that is getting worse, bleeding between periods, or periods that are very irregular or absent — ASRM lists irregular cycles, intermenstrual bleeding and absent periods among the conditions that warrant evaluation without waiting (9). For a fuller picture of the cycle itself, see our guide to the menstrual cycle phases, and for the months before trying, our 90-day preconception guide for women.

Do stress and sleep affect how long it takes to get pregnant?

They may play a modest role, but the evidence is about associations, not proof that relaxing will get you pregnant. Two prospective studies are worth knowing, and neither used a wearable.

Stress. The LIFE study enrolled 501 couples in Michigan and Texas and followed them as they tried to conceive. Women with the highest levels of salivary alpha-amylase — an enzyme used as a stress marker — had about a 29% reduction in the per-cycle chance of conceiving compared with women with the lowest levels (a borderline result), and a roughly twofold higher risk of infertility; salivary cortisol showed no association (11). The authors note they could only sample saliva at the start, so they could not see whether stress rose as attempts failed (11).

Sleep. In PRESTO, 6,873 women answered questions about sleep. Trouble sleeping more than half the time was associated with modestly lower fecundability (ratio 0.87), and shorter sleep with a weaker association; shift work showed none (12). The authors describe the effect as modest.

Two caveats. These associations can run both ways: trying to conceive is stressful, and stress disrupts sleep. And neither study measured anything a phone or smartwatch measures — nothing in any app's stress or sleep numbers tells you about your fertility.

If the waiting is wrecking your sleep or your relationship, that deserves attention for its own sake, whatever it does to the timeline.

When to see a doctor if you're not pregnant yet

ASRM's current definition sets the timeline: for people having regular, unprotected intercourse with no known reason for either partner to have impaired fertility, "evaluation should be initiated at 12 months when the female partner is under 35 years of age and at 6 months when the female partner is 35 years of age or older" (101971-4)).

• Woman under 35, no known issues — Evaluation at 12 months of trying (101971-4))

• Woman 35 or older — Evaluation at 6 months (101971-4))

• Woman over 40 — "More immediate evaluation and treatment may be warranted" (9)

• A condition known to affect fertility — Testing "should be initiated without delay" (9)

ASRM's list of conditions that justify going now, not at month six or twelve, includes irregular menstrual cycles, cycles shorter than 25 days, bleeding between periods, infrequent or absent periods, known or suspected uterine, tubal or peritoneal disease or endometriosis, known or suspected male subfertility, sexual dysfunction, and past chemotherapy or radiation (9). ASRM's 2023 definition also states that nothing in it should be used "to deny or delay treatment to any individual, regardless of relationship status or sexual orientation" (101971-4)).

It takes two. The WHO notes that in the male reproductive system infertility "is most commonly caused by problems in the ejection of semen, absence or low levels of sperm, or abnormal shape (morphology) and movement (motility) of the sperm" (17). An evaluation that looks only at the woman is incomplete.

And separately from fertility timelines: severe abdominal, pelvic or shoulder pain, or fainting when you might be pregnant is an emergency (15); heavy bleeding, fever, chills or severe pain after a pregnancy loss means calling your ob-gyn right away (16).

Trying to conceive: the questions people ask next

How long does it take to get pregnant after stopping birth control?

For most people, within a year. A systematic review and meta-analysis of 22 studies with 14,884 women found that 83.1% became pregnant within 12 months of stopping contraception, and the rate "was not significantly different for hormonal methods and IUD users" (10). The authors concluded that contraceptive use, "regardless of its duration and type," does not have a negative effect on the ability to conceive afterwards (10). If periods do not return within a few months of stopping, talk to a clinician rather than waiting for the 12-month mark; ASRM lists absent or infrequent periods among the reasons to start an evaluation without delay (9).

How long does it take to get pregnant after a miscarriage?

ACOG says you "can get pregnant again as soon as 2 weeks after an early miscarriage," and advises talking with your ob-gyn about the best timing if you want to try again (16). A secondary analysis of 1,083 women after one or two early losses found that couples who started trying within three months were more likely to have a live birth (53.2% vs 36.1%) and conceived sooner; the authors concluded there is "no physiologic evidence for delaying pregnancy attempt after an early loss" (13). Emotional readiness is a separate question, and ACOG advises taking time to recover emotionally and physically before trying again. Heavy bleeding, fever, chills or severe pain after a loss need a call to your ob-gyn right away (16).

It has been four months. Is something wrong with me?

Probably not, and the numbers show why. In the German study with near-ideal timing, 32% of couples had not conceived after three cycles and 19% after six (3). Four months without a pregnancy is common in these data, and ASRM sets the evaluation point at 12 months under 35 and 6 months from 35 (101971-4)). The exceptions are the conditions that warrant going sooner — irregular or absent periods, known endometriosis or tubal problems, known male factors (9). If one of those applies, you do not have to wait.

Should we have sex every day when trying to get pregnant?

Every day is fine, and so is every other day. ASRM says the chance per cycle is highest with sex every one to two days during the fertile window, that sex two to three times a week gives "nearly equivalent" results, and that more frequent sex "is not associated with lower fecundity" (2). Saving up sperm is not supported. The best frequency, ASRM adds, is "best defined by their own preference within that context."

Can I keep exercising, drinking coffee or having a glass of wine while trying?

Mostly, within limits a clinician can tailor. ASRM describes moderate caffeine as having "no apparent adverse effects on fertility or pregnancy outcomes," links high caffeine intake and heavier drinking with reduced fertility, and recommends limiting alcohol and caffeine to "minimal to moderate use" while trying (2). It also states that once pregnant, no safe level of alcohol has been established. The ASRM document does not address exercise, so there is no guideline answer either way here. If you train very hard, are underweight or have lost your periods, raise it with a clinician — ASRM notes fertility rates are lower in women who are very thin (2).

Does my partner need to get checked too?

Yes, if you reach the evaluation point. The WHO describes male-factor causes — problems with ejaculation, low or absent sperm, and abnormal sperm shape or movement — as a recognized part of infertility (17), and ASRM lists known or suspected male subfertility as a reason to start testing without delay (9). Starting both evaluations together avoids months spent testing one partner while the answer lies with the other.

How do I cope with the two-week wait?

No trial covers the two-week wait, so treat this as practical. Decide in advance when you will test — the FDA says the most reliable result comes one to two weeks after a missed period (14) — so you are not testing every morning, and plan something for the evening of test day. ASRM recognizes that the stress of trying "can reduce sexual esteem, satisfaction, and the frequency of intercourse" (2), so talk about it with your partner before it builds up. If anxiety is constant or sleep is falling apart, raise it with a clinician on its own terms.

How to bring this up with your doctor

Say it in one sentence first: "We've been trying to conceive for [number] months, I'm [age], and I'd like to know whether it's time for an evaluation." That gives the two facts guidelines use to set the timeline — duration and age (101971-4)).

Bring a short written history, not a pile of screenshots. Cycle length over recent months, bleeding between periods, pain with periods or sex, past pregnancies or losses, pelvic infections or surgery, medications and supplements, and anything relevant on your partner's side. These are the facts ASRM uses to decide whether to evaluate early (9).

Ask what the first steps are, for both of you. Useful questions: "Given my age and history, should we start an evaluation now or keep trying?", "What would you test first for me, and should my partner have a semen analysis at the same time?", and "Are any of my medications or supplements relevant?"

If you are told to "just relax and keep trying": you can ask, politely, how that fits with ASRM's 6- and 12-month thresholds and with its list of conditions that warrant earlier evaluation (101971-4), 9), ask for your concerns to be noted in your record, and ask for a referral to a reproductive specialist if you meet the criteria.

And do not wait for an appointment for these: sudden severe pain in the abdomen, pelvis or shoulder, or fainting when you might be pregnant, is an emergency room visit or a 911 call (15). Heavy bleeding, fever, chills or severe pain after a pregnancy loss means calling your ob-gyn right away (16).

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How Welltory helps — and what it cannot do

The limits first. Welltory is a general wellness product, not a medical device. It does not diagnose, detect, predict, monitor, prevent, treat or mitigate infertility or any other condition. It does not track ovulation or your cycle, cannot tell you when your fertile window is, and cannot tell you whether you are pregnant. If you already record your cycle in Apple Health or Health Connect, keep it there, next to the notes you make in Welltory. Welltory states that phone-camera measurements may not be accurate if you are pregnant. Nothing in the routine below will make you more likely to conceive.

You note what happened; the app records the day. When a stress stretch appears on your Today screen and the app asks "What happened?", you can tap a suggested tag, type a few words, or just talk: "testing day", "negative test", "period started", "fertility appointment", "argument about timing", "work deadline", "short night". You can add a note any time with the plus icon; it goes into your Journal. The app does not know any of this. You do, and you are the one putting it on the record.

Then look at the days around it. Sleep analysis, resting heart rate, HRV, stress minutes and Battery were recorded on those days the same way as on every other day. Put your notes beside them and you have a dated diary. These are your own numbers against your own history, not a population range and not a fertility signal. Stress minutes, sleep analysis and Battery need a supported wearable.

After two to three weeks of tagging, My Patterns has something to work with. My Patterns collects the tags you add to stress and rest stretches on the Today screen, so it needs iOS with an Apple Watch or Oura. Patterns appear at around seven tagged events in the current month, with some history from the month before. It shows which tagged situations tend to come alongside stressful stretches, which tags do not happen often but hit your body hard, trends by day of week, heart-rate data, and every time a tag occurred.

That record is for you and your appointment. The Journal (Premium) keeps your measurements, tags and notes, and from the Welltory web app you can export a CSV (Dashboard → choose a chart → Export). It is a record you made, not a conclusion the app reached. Any pattern in it is an association to discuss with your doctor, not a cause.

The red flags belong here too, in the same type size: sudden severe abdominal, pelvic or shoulder pain, or fainting when you might be pregnant, is an emergency; heavy bleeding, fever or severe pain after a pregnancy loss means calling your ob-gyn right away (15, 16). Those are not tags.

Where to find other people in the same situation. If you are also living with an energy-limiting condition while trying to conceive, Welltory runs a paid, moderated community called Energy Lab for women aged 18 to 65 living with ME/CFS, long COVID, fibromyalgia, POTS, MCAS and similar. It runs alongside the app: you keep collecting your own data, and the Lab is where people learn to read it together, with a medical board answering the science. It is education and peer support, not medical care, it does not replace your clinician, and there is a 14-day money-back guarantee on a first purchase.

How we made it

Made with AI tools, then edited and fact-checked by the Welltory team. See our Editorial & AI policy.

Data analysis by Jane Smorodnikova, co-founder of Welltory and the person who built the methodology behind how we read physiological data.

Written by Tatsiana Yashyna.

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