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 lifestyle habits, the right supplements, and attention to your partner’s health can meaningfully improve your chances. Here’s what actually moves the needle.
Know Your Fertile Window
Your fertile window is wider than most people think. Sperm can survive inside the body for up to five days, and an egg lives for 12 to 24 hours after ovulation. That creates a roughly six-day stretch each cycle when conception is possible: the five days before ovulation and the day of ovulation itself. For the best odds, aim to have sex every day or every other day during that window.
The trick is figuring out when you’re actually ovulating. Ovulation predictor kits (OPKs) detect a surge in luteinizing hormone (LH) in your urine, which typically happens 24 to 36 hours before you ovulate. Look for kits that advertise at least 99% accuracy. You can also track your basal body temperature each morning before getting out of bed. Your temperature rises slightly after ovulation, so after a few months of charting, you’ll start to see your pattern. Cervical mucus changes are another reliable signal: as ovulation approaches, mucus becomes clear, slippery, and stretchy, similar to raw egg whites.
Using two or three of these methods together gives you a much clearer picture than relying on any one alone. Calendar-based apps can help you log and spot trends, but they’re only as good as the data you put in.
Start Folic Acid Before You Conceive
The CDC recommends 400 micrograms of folic acid daily for all women who could become pregnant. This B vitamin is critical for preventing neural tube defects, which develop in the very first weeks of pregnancy, often before you even know you’re expecting. A standard prenatal vitamin covers this amount, plus it typically includes iron, vitamin D, and other nutrients that support a healthy pregnancy from the start.
CoQ10 is another supplement worth knowing about. It plays a key role in energy production inside your cells, particularly in eggs, which are among the most energy-demanding cells in the body. A 2020 study published in Fertility and Sterility found that CoQ10 improved egg maturation rates and reduced chromosomal errors in eggs from older women. This is especially relevant if you’re in your mid-30s or older, since egg quality naturally declines with age. Talk with your provider about whether CoQ10 makes sense for you and at what dose.
Lifestyle Changes That Improve Fertility
Weight matters more than many people realize. Being significantly underweight or overweight can disrupt ovulation. Even modest changes toward a healthy BMI can restore regular cycles in some women. A diet rich in whole grains, vegetables, healthy fats, and lean protein supports hormonal balance and overall reproductive health.
Caffeine is fine in moderation, but high intake may reduce your chances. Research on Danish couples trying to conceive found that women consuming more than 300 milligrams of caffeine per day (roughly three cups of coffee) had measurably lower odds of conception each cycle, especially if they also smoked. Keeping your intake under 200 to 300 milligrams daily is a reasonable target.
Smoking has a clear, dose-dependent effect on fertility. It damages eggs, accelerates ovarian aging, and reduces the success rates of fertility treatments. Alcohol is less studied, but moderate to heavy drinking is associated with longer time to conception. If you’re actively trying, cutting back on both gives you a concrete advantage.
Exercise helps, but extreme endurance training can suppress ovulation. Regular moderate activity, like brisk walking, swimming, or cycling a few times a week, supports fertility without overdoing it.
Your Partner’s Health Counts Too
About one-third of fertility problems involve the male partner, so this isn’t something to overlook. Sperm count and quality are sensitive to several everyday factors.
- Heat exposure: The testicles need to stay slightly cooler than body temperature to produce sperm effectively. Frequent use of hot tubs, saunas, or even prolonged laptop use on the lap can temporarily lower sperm quality. Loose-fitting underwear and taking breaks from sitting help.
- Smoking: Men who smoke are more likely to have low sperm counts. Quitting improves sperm parameters over the course of a few months.
- Alcohol: Heavy drinking lowers both sperm count and testosterone levels.
- Weight: Higher BMI in men is linked to decreasing sperm count and reduced sperm movement.
These aren’t overnight fixes. Sperm take about 70 to 90 days to fully develop, so lifestyle changes your partner makes today will show up in sperm quality roughly three months later. Starting early is the move.
Choose the Right Lubricant
This is a detail most people miss. Most commercial lubricants, and even saliva, can slow sperm movement or damage sperm. Household oils like coconut oil are also problematic, despite being marketed as natural alternatives. If you need lubrication during sex, look for products specifically labeled “fertility-friendly” or “sperm-friendly.” These are evaluated by the FDA and are typically hydroxyethylcellulose-based, which closely mimics natural cervical mucus without interfering with sperm motility. Avoid anything with added fragrances or parabens.
When to Seek Help
Most couples conceive within a year of trying, but age changes the timeline for getting evaluated. If you’re under 35, the standard recommendation is to seek a fertility evaluation after 12 months of regular unprotected sex without conceiving. If you’re over 35, that drops to six months. And if you’re over 40, it’s worth having a conversation with your doctor right away rather than waiting, because both egg quantity and quality decline more steeply in your early 40s.
Certain situations also warrant earlier evaluation regardless of age: irregular or absent periods, a history of pelvic infections, endometriosis, prior cancer treatment, or known issues with your partner’s sperm. A fertility workup typically involves blood tests to check hormone levels, an ultrasound to look at your ovaries and uterus, and a semen analysis for your partner. These tests can identify common, treatable causes and help you avoid months of frustration.