Getting pregnant comes down to one core principle: sperm needs to meet an egg during a narrow window each month. The choices that matter most are when you have sex and how often, not which position you use or what you do afterward. Here’s what actually makes a difference.
Your Fertile Window Is About 6 Days Long
Each menstrual cycle has roughly six days when pregnancy is possible. This fertile window includes the five days before ovulation and the day of ovulation itself. The reason it stretches back five days is that sperm can survive inside the uterus and fallopian tubes for three to five days, waiting for an egg. The egg, by contrast, lives less than 24 hours after it’s released from the ovary.
This mismatch is why having sex before ovulation is so effective. If sperm is already in the fallopian tubes when the egg arrives, fertilization can happen almost immediately. Your highest-probability days are the two to three days leading up to ovulation.
How to Identify When You’re Ovulating
If your cycle is roughly 28 days, ovulation typically happens around day 14 (counting day 1 as the first day of your period). But cycles vary, so tracking physical signs gives you a more reliable picture.
The most useful signal is cervical mucus. In the days after your period, discharge tends to be dry or sticky. As ovulation approaches, it becomes wetter and creamier. Right before ovulation, it turns clear, slippery, and stretchy, often compared to raw egg whites. This fertile-quality mucus typically shows up around days 10 to 14 of a 28-day cycle and lasts three to four days. It exists for a reason: that slippery consistency helps sperm travel through the cervix and up into the uterus.
Ovulation predictor kits, available at most pharmacies, detect a hormone surge that happens one to two days before the egg is released. Basal body temperature tracking can confirm ovulation after the fact (your temperature rises slightly the morning after you ovulate), but it’s less useful for predicting the fertile window in real time.
How Often to Have Sex
During your fertile window, having sex every one to two days gives you the best chances. Research comparing daily intercourse to every-other-day intercourse found similar pregnancy rates for both approaches, so there’s no need to stick to a rigid schedule. What does lower your odds is having sex only once during the entire fertile window.
A common worry is that frequent ejaculation depletes sperm count. It doesn’t. A study analyzing nearly 10,000 semen samples found that men with normal semen quality maintained healthy sperm concentration and motility even with daily ejaculation. Abstinence intervals longer than five days can actually hurt sperm counts, so avoiding sex to “save up” is counterproductive. The best approach is simply to have sex regularly, especially in that fertile window, at whatever frequency feels natural to you as a couple.
Position Doesn’t Matter Much
No sexual position has been proven to improve the odds of conception. Once sperm enters the vagina, it reaches the fallopian tubes within minutes, regardless of whether you used missionary, from behind, or any other position. Pregnancy happens in positions that seem to work against gravity, like sitting or standing, because sperm transport through the reproductive tract is driven by muscle contractions and the sperm’s own movement, not by gravity.
That said, positions allowing full penetration do place sperm closer to the cervix, which is the opening to the uterus. Missionary and from-behind positions accomplish this naturally. But if those aren’t comfortable or enjoyable for you, don’t force it. The timing of sex matters far more than the mechanics.
What to Do (and Skip) Afterward
There’s no strong scientific evidence that lying down after sex increases your chances of getting pregnant. However, standing up or going to the bathroom right away does let gravity pull semen away from the cervix. Lying on your back for about 15 minutes after sex gives sperm extra time to move in the right direction. It’s a low-effort step, and while it’s not proven to be essential, it’s unlikely to hurt.
Elevating your hips on a pillow falls into the same category: not scientifically validated, but harmless if it makes you feel like you’re doing something proactive.
Watch Your Lubricant Choice
If you use lubricant, choose carefully. Most commercial lubricants slow sperm movement, and saliva does too. Look for lubricants that are hydroxyethylcellulose-based, as these don’t reduce sperm motility and closely match the consistency of natural vaginal mucus. Avoid products with fragrances or parabens. Household oils like coconut oil are not a good substitute either, despite being a popular suggestion online. Fertility-friendly lubricants are labeled as such and are widely available.
If you produce enough natural lubrication, especially the egg-white cervical mucus that appears near ovulation, you may not need lubricant at all during your most fertile days.
How Long It Typically Takes
Most couples who time intercourse correctly conceive within several months, but it can take up to a year even when nothing is wrong. Per-cycle conception rates for healthy couples hover around 15 to 25 percent, so a few months of trying without success is completely normal.
If you’re under 35 and haven’t conceived after 12 months of regular, unprotected sex, a fertility evaluation is recommended. If you’re 35 or older, that timeline shortens to six months. If you’re over 40, it’s worth having that conversation with a provider before you start trying, since fertility declines more steeply after that age and earlier evaluation can open up more options.