The single most effective thing you can do to increase your chances of getting pregnant is have sex during your fertile window, which spans about six days each cycle. A healthy 30-year-old woman has roughly a 20% chance of conceiving in any given month, so even with perfect timing, it often takes several cycles. The good news: there are concrete steps both you and your partner can take to push those odds in your favor.
Know Your Fertile Window
Your fertile window is wider than many people realize. Sperm can survive inside the body for up to five days, while an egg lives only 12 to 24 hours after ovulation. That means you can conceive from sex that happens as early as five days before ovulation or as late as one day after. For most women with a 28-day cycle, ovulation falls around day 14, but cycles vary. Ovulation predictor kits, which detect a hormone surge in your urine, can help you pinpoint the window more precisely.
During those six days, aim for sex every day or every other day. Both frequencies produce similar conception rates, so go with whatever feels sustainable and enjoyable. There’s no need to “save up” sperm by abstaining. Frequent ejaculation keeps sperm fresh without meaningfully lowering counts.
How Age Affects Your Odds
Age is the single biggest factor in monthly conception rates, and the decline is steeper than most people expect. At 30, the chance per cycle is about 20%. By 40, it drops below 5%. This isn’t just about egg quantity. Egg quality also declines, which increases the likelihood of chromosomal abnormalities and early miscarriage.
That doesn’t mean pregnancy after 35 is impossible. It means time matters more. If you’re under 35 and have been trying for 12 months without success, that’s the point to pursue a fertility evaluation. If you’re 35 or older, seek evaluation after six months. Women over 40 may benefit from earlier assessment. And if you have irregular cycles, a known condition like endometriosis, or a partner with suspected fertility issues, don’t wait at all.
Get to a Healthy Weight
Body weight has a direct effect on ovulation. A BMI below 18.5 (underweight) often causes irregular periods and can stop ovulation entirely. A BMI in the obese range (30 or above) also disrupts menstrual cycles and ovulation. The optimal range for fertility falls between about 19 and 24.
This doesn’t mean you need to hit a perfect number before trying. Even modest weight changes, in either direction, can restore more regular cycles. If your periods are irregular and your weight is significantly outside the normal range, that’s a practical place to start. The same applies to your partner: rising BMI in men is linked to lower sperm counts and reduced sperm movement.
What to Eat (and Take)
No single food will make you fertile, but overall dietary patterns matter. A Mediterranean-style diet, rich in fruits, vegetables, whole grains, legumes, nuts, fish, and olive oil, with limited red and processed meat, shows favorable associations with fertility outcomes. Think of it as eating in a way that reduces inflammation and supports steady blood sugar, both of which help hormonal balance.
One supplement is non-negotiable: folic acid. The CDC recommends 400 micrograms daily for all women who could become pregnant. This prevents neural tube defects, which develop in the earliest weeks of pregnancy, often before you know you’re pregnant. A standard prenatal vitamin covers this, so start taking one now rather than waiting for a positive test.
Your Partner’s Role
Roughly a third of fertility challenges involve the male partner, so this isn’t a one-person project. The same healthy-weight guidance applies to men. Beyond that, sperm quality is sensitive to heat. Prolonged exposure from hot tubs, saunas, or even laptops resting directly on the lap can temporarily lower sperm production. Tight underwear is often cited, though the evidence is weaker.
Untreated sexually transmitted infections like chlamydia and gonorrhea can cause male infertility, sometimes without obvious symptoms. If either partner hasn’t been tested recently, it’s worth doing before you start trying in earnest.
Environmental Chemicals to Minimize
Certain chemicals found in everyday products can interfere with reproductive hormones in both men and women. BPA, commonly found in plastic food containers and can linings, can bind to hormone receptors and disrupt testosterone production and sperm development. Phthalates, used in fragrances, vinyl, and some personal care products, interfere with cells that produce testosterone by blocking a key step in the process.
You don’t need to overhaul your entire life, but simple swaps help. Use glass or stainless steel containers for food storage. Avoid microwaving food in plastic. Choose fragrance-free personal care products when possible. These chemicals act by mimicking your body’s own hormones and competing for the same receptors, so reducing exposure removes one variable you can actually control.
Choose the Right Lubricant
This is a detail many couples overlook. Most lubricants, including saliva, slow sperm movement. Household oils like coconut oil aren’t safe alternatives either. If you need lubrication, look for products specifically labeled “fertility-friendly” or “sperm-friendly,” which must be evaluated by the FDA before they can carry that label. The best options are hydroxyethylcellulose-based, which closely match natural vaginal mucus in consistency without harming sperm. Avoid anything with added fragrances or parabens.
Habits That Help (and Ones to Drop)
Smoking damages egg and sperm quality and accelerates the age-related decline in fertility. Quitting improves outcomes for both partners. Heavy alcohol use disrupts ovulation and lowers sperm quality, though moderate consumption (a few drinks per week) has less clear effects. If you’re actively trying, cutting back is a reasonable precaution.
Exercise supports fertility when it’s moderate. Intense endurance training, the kind that disrupts your menstrual cycle, can suppress ovulation. If your periods become irregular after ramping up a workout routine, that’s a signal to scale back. Stress is harder to quantify, but chronic stress elevates cortisol, which can interfere with the hormonal signals that trigger ovulation. Regular sleep, manageable exercise, and whatever genuinely helps you decompress all contribute to a hormonal environment that supports conception.
For most healthy couples, these steps are enough. Conception is a numbers game played over months, not days. Each cycle that doesn’t result in pregnancy isn’t a failure. It’s statistically normal. Stack the controllable factors in your favor, stay consistent with timing, and give your body the conditions it needs to do the rest.