When you're trying to get pregnant, a lot comes down to timing. After all, nature gives us a brief window each month to conceive. While it's possible to get pregnant any day of the month (due to fluctuations in your cycle), you're much more likely to score a fertilized egg (and get the good news that you're expecting) if you work with your body's regular reproductive rhythm.Wondering when is the best time to get pregnant? Here are the ways to know exactly when to spring into (bedroom) action for the greatest chances of conception success.

When is the best time in your cycle to get pregnant?

Best time to get pregnant in your cycle

Okay, here's a quick biology refresher on how you really get pregnant: When you ovulate, your ovary releases a ripe egg into the fallopian tube that's ready to be fertilized by a sperm. That egg has only 12 to 24 hours to meet that sperm.

Luckily, sperm stick around in the fallopian tubes for longer (up to several days). That means that while it's ideal to have sex on the day you ovulate, you may also get pregnant if you do the deed a few days before ovulation. Viable sperm should still be in your fallopian tubes when that egg arrives.So how do you pinpoint when you'll be ovulating? First, determine the length of your average monthly cycle. To do this, count the days between your periods, starting at the first day of your period. While 28 days is average, there's a wide range of normal. Yours may be 21 days, 35 days or somewhere in between — and that's completely fine, fertility-wise.

Now, time for some math. The first half of the cycle (the follicular phase) varies from woman to woman. But the second half (the luteal phase) is usually the same for all of us: 14 days, though it can be 12 days. That means if you get your period 28 days after the last one began, for example, then you'll likely ovulate on day 14 or 16.