--- 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://www.lifecarecenter.org/hubfs/Imported_Blog_Media/When%20did%20I%20conceive.jpg --- [Skip to Content](https://www.lifecarecenter.org/helpful-advice/when-did-i-conceive#main-content) - [Call | (785) 242-4500](tel:+17852424500) - [Text | (785) 242-4500](sms:+17852424500) - [After Hours Emergency Hotline | 1 (800) 712-4357](tel:+18007124357) [![LifeCare Center Logo](https://www.lifecarecenter.org/hubfs/LifeCare%20Center%20Logo.svg)](https://www.lifecarecenter.org) - [Home](https://www.lifecarecenter.org) - Show submenu for FAQ's FAQ's - [First Appointment Expectations?](https://www.lifecarecenter.org/what-to-expect) - [Am I Pregnant?](https://www.lifecarecenter.org/helpful-advice/am-i-pregnant) - [When Did I Conceive?](https://www.lifecarecenter.org/helpful-advice/when-did-i-conceive) - [Does Abortion Hurt?](https://www.lifecarecenter.org/helpful-advice/does-abortion-hurt) - [How To Prepare For The Abortion Pill](https://www.lifecarecenter.org/helpful-advice/abortion-pill-ottawa) - [Can The Abortion Pill Be Reversed?](https://www.lifecarecenter.org/helpful-advice/abortion-pill-reversal-ottawa) - Show submenu for Services Services - [Text Our Nurses](https://www.lifecarecenter.org/nurse-chat) - [Considering Abortion?](https://www.lifecarecenter.org/abortion-info) - [Pregnancy Tests](https://www.lifecarecenter.org/free-pregnancy-tests) - [Ultrasounds](https://www.lifecarecenter.org/free-ultrasound) - [STI/STD Tests](https://www.lifecarecenter.org/std-sti-testing) - [Prenatal & Parenting Classes](https://www.lifecarecenter.org/prenatal-parenting-support) - [Post-Abortion Counseling](https://www.lifecarecenter.org/post-abortion-counseling) - [Miscarriage Support](https://www.lifecarecenter.org/miscarriage-support) - [Fatherhood Mentorship](https://www.lifecarecenter.org/fatherhood-mentorship) - [Helpful Advice](https://www.lifecarecenter.org/helpful-advice) [Request Appointment](https://www.lifecarecenter.org/request-appointment) [Home](https://www.lifecarecenter.org) Show submenu for FAQ's FAQ's Show submenu for Services Services [Helpful Advice](https://www.lifecarecenter.org/helpful-advice) [Request Appointment](https://www.lifecarecenter.org/request-appointment) # When Did I Conceive? ![When Did I Conceive?](https://www.lifecarecenter.org/hubfs/Imported_Blog_Media/When%20did%20I%20conceive.jpg) So, you’re pregnant. Now you might be wondering—when exactly did you conceive, and how can you determine who the father is? Need answers now? Text or speak anonymously with a nurse for free at [(785) 242-4500](sms:+17852424500).    While pinpointing the exact moment of conception isn't scientifically possible, your body's natural rhythms and cycles can provide a fairly close estimate of when it occurred.   ## What Date Did I Conceive? Whether you're just a few weeks or several months into your pregnancy, you can use simple calculations to estimate when you likely conceived.    On average, **there are two-to-three days when you ovulate** – the time when your body can get pregnant – each menstrual cycle. This usually happens around two weeks after the start of your last period.   ##### Conception Date Calculator By figuring out how much time has passed since your last period, you can get a rough idea of your ovulation window and, therefore, when conception might have occurred. If you’d rather not do the math on your own, there are free online tools to help with this calculation, or you can text us at [(785) 242-4500](sms:+17852424500)[sms:+17852424500](sms:+17852424500) for assistance. Remember, this is just an estimate. Every woman’s cycle is different—some have longer or shorter ovulation periods, and ovulation may happen earlier or later in the cycle. Also, it’s important to note that sperm can survive for up to five days in the body, meaning intercourse before the ovulation window opens can still lead to pregnancy if the sperm remains viable.1, 2   ##### Conception Calculator First Day of Your Last Period: Average Length of Cycles: Calculate Please enter valid inputs.   ##### Conception Date from Ultrasound Another way to estimate your conception date is by having an [ultrasound](https://www.lifecarecenter.org/free-ultrasound). Since fetuses develop at a consistent rate, an ultrasound can provide a more precise estimate of when conception occurred compared to an ovulation calculator. Beyond determining when you conceived, an ultrasound also helps verify the health and viability of the pregnancy, ensuring that it hasn’t ended in miscarriage and isn’t ectopic.3 While you can get an ultrasound at your OB-GYN’s office, this often involves paperwork and billing. At LifeCare Center, we offer free ultrasound services, which may allow you to avoid dealing with insurance or hospital procedures.   ##### 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](https://www.lifecarecenter.org/book-appointment). Simply send a text to [(785) 242-4500](sms:+17852424500) and get a real certified nurse to answer your questions and walk you through your options.   ---   Sources: 1. https://www.mayoclinic.org/healthy-lifestyle/getting-pregnant/expert-answers/ovulation-signs/faq-20058000 2. https://my.clevelandclinic.org/health/articles/23439-ovulation 3. https://my.clevelandclinic.org/health/diagnostics/9704-ultrasound-in-pregnancy   ![LifeCare Center Logo - white](https://www.lifecarecenter.org/hubfs/LifeCare%20Center%20Logo%20-%20white.svg)   **Quick Links** **![Line](https://www.lifecarecenter.org/hubfs/Line.svg)** - [Make A Donation](https://www.lifecarecenter.org/for-donors) - [Contact Us](https://www.lifecarecenter.org/contact) - [Location](https://www.google.com/maps/place/LifeCare+Center/@38.6160088,-95.2701412,16z/data=!3m1!4b1!4m6!3m5!1s0x87bf4dd527376d53:0x24ca26c50596cf51!8m2!3d38.6160046!4d-95.2675663!16s%2Fg%2F1tctm9hx?entry=tts&g_ep=EgoyMDI1MDgxOS4wIPu8ASoASAFQAw%3D%3D&skid=23685e0b-0d82-4d69-bba7-4bb2af1acdca) **Here For You** **![Line](https://www.lifecarecenter.org/hubfs/Line.svg)** LifeCare Center does not offer or refer for pregnancy terminations or birth control. 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