When Did I Conceive?

So, you’re pregnant. But when did you conceive—and how can you know who the father is? If you need answers now, you can chat anonymously with a nurse for free at (803) 598-8400.

While there’s no exact way to pinpoint the exact moment of conception, your body follows patterns and cycles that can help you estimate when it likely happened.

What Date Did I Conceive?

Whether you’re 2 or 20 weeks pregnant, you can use simple math to estimate when you likely conceived.

Most people ovulate during a 2–3 day window each cycle, typically about two weeks after the start of their last period. That’s the time when pregnancy can happen.

Conception Date Calculator

By counting from the start of your last period, you can estimate your ovulation window—and get a general idea of when you conceived.

If the math feels tricky, free online calculators can help (like the one below), or you can text us at (803) 598-8400.

Keep in mind, this is just an estimate. Every woman’s cycle is different. Some ovulate earlier or later, and the window can vary in length.

Also, sperm can live in the body for up to five days. That means sex before ovulation can still lead to pregnancy if the timing lines up.

Conception Calculator

If you need help figuring out which day you conceived or if you have any questions about pregnancy in general, we’re here to help.

Simply send a text to (803) 598-8400. and get a real certified nurse to answer your questions and walk you through your options.