---
title: When Did I Conceive?
description: While there’s no hard science to find the absolute moment of conception, there are a few ways that can help you determine when you conceived.
image: https://alphapregnancysupport.com/hubfs/Imported_Blog_Media/When%20did%20I%20conceive.jpg
---

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# When Did I Conceive?

 March 06, 2024  | [Alpha Pregnancy Center](https://alphapregnancysupport.com/blog/author/alpha-pregnancy-center)

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So, you’re pregnant. But on what date did you conceive, and how can you know who the father is? 

 

Finding the exact moment of conception, like when you get your period, isn't an exact science. However, there are rhythms and cycles in your body that can help you get a pretty good idea of when it might have happened.

 

## What Date Did I Conceive?

No matter if you're 2 or 20 weeks into your pregnancy, there’s some simple math you can perform to confidently know around the time you conceived. 

 

On average, **there are two-to-three days when you ovulate** – the time when your body can get pregnant – each menstrual cycle. This occurs **about two weeks after your last period started**.

 

> **Have questions but prefer to talk directly with someone?** Text with a professional 24/7 at **[(336)-901-3918](sms:+13369013918).** It's always free and confidential. We have resources that can help you understand your conception window. 

 

 

##### Conception Date Calculator

By calculating the time since your last period, you can get a rough idea of your ovulation window and, hence, when you conceived.

 

If that math is a little rough to do in your own head, there are free online calculators to help, or you can **give us a text to chat directly with a nurse at  [(336)-901-3918](sms:+13369013918).**

 

Again, *this is just a general estimate*. It’s important to know that each woman’s menstrual cycle and ovulation window is different. Some ovulate for longer periods of time than others and may ovulate earlier or later in their cycle.

 

Also, sometimes *having* *sex before the ovulation window begins can still result in pregnancy*. That's because sperm can stay alive for up to five days. So, even if it happens before ovulation, it can still fertilize an egg if it lasts long enough.

 

##### Conception Calculator

First Day of Your Last Period:

Average Length of Cycles:

Calculate

 

 

## Conception Date from Ultrasound

Another way to figure out when conception happened is through an ultrasound. Fetuses usually grow at a consistent rate, so we can actually measure the age. A**n ultrasound can give a more accurate date range than an ovulation calculator**.

 

Having an ultrasound not only helps you know when you conceived but can also confirm the health of the fetus.

 

You can have an ultrasound performed at your local OBGYN office. However, there’s usually paperwork and billing involved. Alpha can refer for [free ultrasound services](https://alphapregnancysupport.com/free-ultrasound) without the need for hospitals or insurance companies to get involved.

 

### Get Help Determining Your Conception Date

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 **[(336)-901-3918](sms:+13369013918)** and get a real certified nurse to answer your questions and walk you through your options.

#### Searching for Answers?

We’re available to help on your own terms. Support is available through text, call, or in-person at our facility. All with your anonymity preserved.

 

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