The single most effective thing you can do to get pregnant is have sex every day or every other day during your six-day fertile window, which includes the five days before ovulation and the day of ovulation itself. Couples who maintain this frequency have the highest pregnancy rates. Beyond timing, a combination of lifestyle adjustments, nutritional preparation, and attention to your partner’s health can meaningfully improve your odds.
Know Your Fertile Window
You can only conceive during a narrow window each cycle. An egg survives about 12 to 24 hours after ovulation, but sperm can live inside the reproductive tract for up to five days. That creates a roughly six-day stretch where sex can lead to pregnancy: the five days before ovulation plus ovulation day itself.
The trick is figuring out when that window falls. For someone with a regular 28-day cycle, ovulation typically happens around day 14, but cycles vary. Several methods can help you pinpoint it:
- Ovulation predictor kits detect a hormone surge in your urine about 24 to 36 hours before ovulation. They’re widely available at pharmacies and give you a clear heads-up.
- Basal body temperature tracking involves taking your temperature first thing every morning. After ovulation, your temperature rises slightly (about 0.5°F) and stays elevated. This confirms ovulation happened but works best over several cycles so you can see your pattern.
- Cervical mucus changes offer a free, real-time signal. As you approach ovulation, mucus becomes clear, slippery, and stretchy, similar to raw egg whites. That’s your most fertile sign.
If tracking feels stressful or complicated, there’s a simpler approach: have sex every one to two days throughout your cycle. This ensures sperm are present whenever ovulation occurs, without needing to predict the exact day.
How Often to Have Sex
Daily sex and every-other-day sex during the fertile window produce similarly high pregnancy rates. There’s no evidence that “saving up” sperm by waiting longer improves your chances. In fact, long gaps between ejaculation can reduce sperm quality. If daily sex feels like pressure, every other day works just as well. The key is consistency during that fertile stretch rather than trying to time a single perfectly placed attempt.
Body Weight and Ovulation
Your weight has a direct effect on whether you ovulate regularly, and ovulation is the non-negotiable requirement for natural conception. Women with a BMI above 27 have roughly 2.4 times the risk of not ovulating compared to women in the normal range of 18.5 to 24.9. That risk climbs steadily with weight: at a BMI of 30 to 32, the risk is about 2.7 times higher.
Being significantly underweight can also shut down ovulation. When your body doesn’t have enough energy reserves, it deprioritizes reproduction. If your periods are irregular or absent at either end of the weight spectrum, that’s a strong signal your body isn’t ovulating consistently. Even a modest change, losing or gaining 5 to 10 percent of your body weight, can be enough to restore regular cycles.
What to Eat and Take Before Conception
Start taking 400 micrograms of folic acid daily, ideally at least one month before you start trying. Folic acid is critical for preventing neural tube defects in early pregnancy, and the neural tube forms before most women even know they’re pregnant. The CDC recommends this dose for all women who could become pregnant. If you’ve had a previous pregnancy affected by a neural tube defect, the recommended dose jumps to 4,000 micrograms daily.
Beyond folic acid, a diet rich in whole grains, fruits, vegetables, lean protein, and healthy fats supports hormonal balance and overall reproductive health. Iron from plant sources (beans, spinach, fortified cereals) paired with vitamin C for absorption is particularly useful, since iron demands increase significantly during pregnancy. Think of preconception nutrition as building reserves your body will draw on heavily in the first trimester.
Alcohol and Caffeine
Heavy drinking reduces your chances of conceiving. Women who consume more than seven alcoholic drinks per week are about 7 percent less likely to conceive, and if a male partner drinks at the same level, the chances of a live birth drop by 9 percent. There’s no clearly established “safe” amount of alcohol when trying to conceive, so cutting back or stopping entirely removes one variable from the equation.
Caffeine, on the other hand, appears to be less of a concern than many people assume. Research on couples undergoing fertility treatment found that caffeine consumption by either partner didn’t affect the odds of pregnancy or live birth. Most guidelines still suggest keeping caffeine under 200 milligrams a day (roughly one 12-ounce cup of coffee) as a reasonable precaution, but moderate intake doesn’t seem to be the fertility obstacle many fear.
Your Partner’s Health Matters Too
Sperm quality is half the equation, and several straightforward habits can protect or improve it. Men who smoke cigarettes are more likely to have low sperm counts. Excess body weight is linked to lower sperm counts and reduced sperm movement. Stress can interfere with the hormones needed to produce healthy sperm and can also reduce sexual desire and frequency.
Heat is a surprisingly important factor. The testicles sit outside the body for a reason: sperm production requires a temperature slightly below core body temperature. Frequent use of saunas, hot tubs, or even prolonged sitting can raise scrotal temperature enough to impair sperm production. Switching to loose-fitting underwear and taking breaks from long sitting sessions are simple changes that may help. Untreated sexually transmitted infections like chlamydia and gonorrhea can also cause male infertility, so both partners should be screened if there’s any concern.
Reduce Exposure to Hormone-Disrupting Chemicals
Certain everyday chemicals can interfere with the hormonal signals your body needs to ovulate, develop eggs, and maintain a healthy uterine lining. These substances mimic estrogen or other sex hormones, disrupting the delicate feedback loop between your brain and ovaries. The result can be irregular cycles, impaired egg development, or reduced ovarian function.
The most common culprits are BPA (found in some plastics, canned food linings, and receipt paper), phthalates (in fragranced products, soft plastics, and some personal care items), parabens (in cosmetics and skincare products), and certain pesticides. You don’t need to overhaul your entire life, but a few practical swaps reduce your exposure meaningfully:
- Food storage: Use glass or stainless steel containers instead of plastic, especially for heating food.
- Personal care products: Choose fragrance-free options and check labels for parabens and phthalates.
- Produce: Wash fruits and vegetables thoroughly, or buy organic for the items you eat most often.
- Receipts: Decline paper receipts when possible, since thermal paper often contains BPA.
When to Get Help
Most healthy couples under 35 conceive within a year of trying. If you haven’t gotten pregnant after 12 months of regular, unprotected sex, a fertility evaluation is the appropriate next step. That timeline shortens with age. If you’re over 35, seek evaluation after six months. If you’re over 40, guidelines recommend getting evaluated before you start trying, since egg quantity and quality decline more rapidly in the late 30s and early 40s.
An evaluation typically involves checking whether you’re ovulating, ensuring your fallopian tubes are open, and analyzing your partner’s sperm. About one-third of fertility issues trace to the female partner, one-third to the male partner, and the remaining third are a combination or unexplained. Getting both partners assessed early avoids months of waiting when a treatable issue might be the only thing standing in the way.