When Trying to Get Pregnant, Are Millions of Women Doing It All Wrong?

When Trying to Get Pregnant, Are Millions of Women Doing It All Wrong?

True or False? Trying to conceive in the two days after ovulation increases a woman's chances of success.

If you answered true, you're in good company — nearly 60 percent of women surveyed thought so too — but it's actually FALSE.

In a 2014 study, a group of researchers from Yale University surveyed 1,000 reproductive-aged women to evaluate common attitudes and understandings about trying to conceive. What they found was startling.

A lot of women have no idea when they are most fertile.

There's a lot of science that goes into knowing when the best time to try is. Luckily, all you really have to do to find out when you're fertile is use this one super handy equation:

Yep, that's the real equation researchers came up with to determine the days of your menstrual cycle that are most fertile. So what does that mean for you?

In general, you are most fertile for a 6-day window that starts 4 days prior to ovulation and ends 1 day after ovulation — within that window, your chances only change by about 3% percent, so there's no need to "perfectly time" intercourse to conceive.

For real, when you account for all the factors that go into getting pregnant, your chances during the 6 day window fluctuate from about 11%-14% on any given day. Outside of the fertile window, your chances of conceiving are generally less than 5%.

Why is this? Well, while the egg is available for fertilization for a very short period of time, sperm can actually survive in the female reproductive tract for days. When you have sex earlier in your cycle, sperm are ready for fertilization right when the egg is released and chances of conception go up.

If you're in the habit of waiting until you get a "positive" on your ovulation predictor kit (OPK) or until you see a rise in your basal body temperature (BBT) before you start trying, chances are you're missing the boat.

"If you're waiting until you get a positive on your ovulation predictor kit before you start trying, chances are you're missing the boat."

How to maximize your chances

1. Don't stress being perfect. Like we said above, your chances of conception only change by about 3% within the fertile window, so don't stress trying to time intercourse to the exact moment you ovulate. Statistically, your best chances are 2 or 3 days before ovulation.
2. Identify your fertile window. Most women with a regular cycle will ovulate about 14 days before their period starts, so time intercourse accordingly. If your cycle is irregular, things will be more difficult. You won't be perfect every cycle and that's ok. Remember, it's always better to try on the early side.
3. Try multiple times. During your six-day window, try to have sex every other day, but not more than once per day.
4. Make improvements that matter. While the timing of intercourse won't dramatically change the chances of conception, there are several things you can do that will. The Conceivable Program gives you the tools and knowledge to dramatically change your fertility.

Frequently Asked Questions

Why doesn't trying after ovulation work?

Once ovulation has occurred, the egg is only available for fertilization for a very short window — typically 12 to 24 hours. By the time most women detect a BBT rise or a positive OPK result, that window is already closing. Sperm, on the other hand, can survive in the reproductive tract for several days, which is why having sex before ovulation is far more effective.

Is it really okay to have sex every other day instead of every day during the fertile window?

Yes. Research suggests that daily intercourse during the fertile window offers only a marginal benefit over every-other-day intercourse, and in some cases, spacing it out slightly can help maintain healthy sperm counts. The goal is regular, relaxed effort — not perfect timing.

What if my cycle is irregular — can I still identify my fertile window?

Irregular cycles make predicting ovulation more challenging, but not impossible. Tracking multiple signals together — such as cervical mucus changes, BBT, and cycle length patterns over several months — gives you a more complete picture. Programs like Conceivable are designed to help you read these signals in combination, rather than relying on any one method alone.

How does the Conceivable system actually work?

Conceivable combines three things: personalized supplement packs built from your quiz results and health data, an AI care team of 7 specialists (led by Kai, your fertility coordinator) who adjust your protocol as your body changes, and the Halo Ring for continuous biometric tracking. The system is built on 240,000+ clinical data points and 20 years of practice. It starts at $15/month.

How do I know which supplements I actually need?

Take the free 2-minute Conceivable quiz. It analyzes your cycle patterns, energy, stress, digestion, and health history to identify the specific nutrients your body needs — not a generic prenatal, but a protocol built for exactly where you are right now.

Do I need the Halo Ring to use Conceivable?

No. The Halo Ring is optional and adds continuous tracking of BBT, HRV, sleep, and blood glucose — which Kai uses to fine-tune your protocol in real time. But the personalized supplement packs and AI care team work without it. The ring is a one-time $250 purchase with no subscription required.