The single most effective thing you can do to get pregnant is have sex during your fertile window, which spans about six days each cycle. Beyond timing, a combination of dietary choices, lifestyle habits, and body awareness can meaningfully improve your odds. Here’s what actually moves the needle.
Know Your Fertile Window
Your fertile window is wider than most people think. Sperm can survive in the body for up to five days, and an egg lives for 12 to 24 hours after ovulation. That gives you roughly six days each cycle where conception is possible: the five days before ovulation and the day of ovulation itself.
For the best chance of conceiving, have sex every day or every other day during this window. You don’t need to pin down the exact hour of ovulation. Consistent sex throughout those six days keeps a fresh supply of sperm ready when the egg is released. If your cycles are regular and roughly 28 days, ovulation typically falls around day 14, but this varies widely from person to person.
Track Ovulation Without Guessing
Ovulation predictor kits (available at any pharmacy) detect a hormone surge that happens one to two days before ovulation. They’re straightforward: you test your urine daily starting a few days before you expect to ovulate, and a positive result means your most fertile hours are approaching.
Your cervical mucus is another reliable signal that costs nothing to track. In the days leading up to ovulation, discharge becomes wet, stretchy, and slippery, often compared to raw egg whites. When you notice that texture, you’re in your most fertile phase. After ovulation, mucus typically dries up or becomes sticky. Paying attention to this pattern for a cycle or two can help you identify your window without any gadgets.
Basal body temperature tracking (taking your temperature first thing every morning) can confirm that ovulation happened, but it’s less useful for predicting it in real time since the temperature rise occurs after the egg is already released.
Eat for Fertility
A diet rich in vegetables, fish, seafood, and healthy fats is consistently linked to better fertility outcomes. This pattern resembles a Mediterranean-style diet and supports regular ovulation. Folic acid, vitamin D (if you’re deficient), and omega-3 fatty acids from fish are the nutrients with the strongest evidence behind them.
On the flip side, diets heavy in red meat, refined oils, trans fats, and added sugar are associated with reduced fertility. Pesticide residues on produce may also play a role, so washing fruits and vegetables thoroughly or choosing organic for the most heavily sprayed items is a reasonable step.
Start taking 400 micrograms of folic acid daily now, before you conceive. The CDC recommends this for all women who could become pregnant, because folic acid prevents neural tube defects that develop in the earliest weeks of pregnancy, often before you even know you’re pregnant. Most prenatal vitamins contain this amount. If you’ve had a previous pregnancy affected by a neural tube defect, the recommended dose jumps to 4,000 mcg daily, starting at least a month before conception.
Body Weight and Fertility
Weight has a direct effect on ovulation. Women with a BMI above 27 have roughly two to three times the risk of anovulatory infertility, meaning their bodies stop releasing eggs regularly. This risk climbs steadily as BMI increases. Data from a large nursing study found that even a BMI of 24 to 26 at age 18 was associated with a 30% higher risk of ovulation problems later.
Being significantly underweight can also disrupt ovulation through the same hormonal pathway. The body interprets low energy availability as a signal that it’s not a good time to reproduce, and menstrual cycles become irregular or stop altogether. If your periods are irregular in either direction, reaching a moderate, stable weight is one of the most impactful changes you can make.
Exercise: Moderate Is Better Than Intense
Moderate physical activity has no negative effect on fertility and supports overall health during conception. But high-intensity exercise, the kind that leaves you feeling exhausted and interferes with your energy levels over time, is associated with about a 16% reduction in fertility. The mechanism is straightforward: extreme exercise can drain the body’s energy reserves enough to disrupt estrogen levels, delay ovulation, lengthen your cycle, and shorten the luteal phase (the post-ovulation window when a fertilized egg would implant).
If you’re currently training at a very high volume, such as long-distance running, intense CrossFit, or multiple hours of vigorous activity most days, scaling back to moderate levels may help restore regular ovulation. Walking, swimming, cycling at a comfortable pace, and strength training a few times a week are all fine.
What Your Partner Can Do
Fertility isn’t only about the person carrying the pregnancy. Sperm quality matters just as much for conception, and several straightforward changes can improve it.
- Avoid excess heat. Sperm production is sensitive to temperature. Wearing loose-fitting underwear, limiting time in hot tubs and saunas, and avoiding long periods of sitting with a laptop on the lap can all help.
- Don’t smoke. Cigarette use is directly linked to lower sperm counts.
- Limit alcohol. Heavy drinking lowers sperm count, reduces testosterone, and can cause erectile difficulties.
- Maintain a healthy weight. Higher BMI in men is associated with lower sperm count and reduced sperm motility.
These aren’t minor effects. Sperm take about 70 to 90 days to fully develop, so improvements in lifestyle habits now will show up in sperm quality two to three months later. Starting early gives those changes time to take effect.
Alcohol and Caffeine
Women who drink more than seven alcoholic drinks per week have measurably lower odds of conceiving, with one study showing a 7% reduction in pregnancy rates compared to non-drinkers. Cutting back to a few drinks per week or eliminating alcohol entirely while trying to conceive is a simple way to remove a potential barrier.
Caffeine, on the other hand, doesn’t appear to affect pregnancy odds for either partner. Moderate coffee consumption (a cup or two a day) is not something you need to worry about during the trying phase, though many providers recommend reducing caffeine once you’re actually pregnant.
Age and Realistic Expectations
Age is the single biggest factor in how quickly you’ll conceive, and it helps to know the numbers so you can set realistic expectations. A woman in her early to mid-20s has a 25 to 30% chance of getting pregnant in any given cycle. That’s the peak. By age 40, that probability drops to around 5% per cycle. These numbers don’t mean pregnancy is impossible at older ages, but they do mean it typically takes longer, and the window where everything needs to align is narrower.
If you’re under 35 and have been trying for 12 months without success, a fertility evaluation is recommended. If you’re over 35, that timeline shortens to six months. And if you’re over 40, it’s worth getting an evaluation before you start trying or as soon as possible after, since earlier intervention opens up more options.
Habits That Help in the Background
Sleep often gets overlooked, but it plays a role in hormonal regulation. Aim for seven to nine hours consistently. Chronic sleep deprivation can interfere with the hormones that govern your menstrual cycle.
Stress reduction is harder to quantify, but prolonged, intense stress can delay or suppress ovulation through the same hormonal pathways that respond to extreme exercise or low body weight. You don’t need to achieve perfect zen, but if your stress levels are high enough to affect your sleep, appetite, or cycle regularity, finding ways to manage that (whatever works for you personally) is worth the effort.
Stop smoking if you haven’t already. Smoking affects egg quality, damages the lining of the uterus, and accelerates the age-related decline in fertility. It’s one of the few lifestyle factors where the evidence is unambiguous and the impact is large.