So, you're pregnant. But how can you determine the exact date of conception, and how can you know who the father is? Need answers now? Chat with a nurse anonymously for free at (719) 694-3201.
Although there’s no exact science to pinpoint the exact moment of conception, much like your menstrual cycle, there are rhythms and patterns that can help you estimate when conception likely occurred.
What Date Did I Conceive?
Whether you're 2 or 20 weeks into your pregnancy, there are simple calculations you can use to estimate when conception likely happened.
Typically, ovulation occurs when your body is most fertile for about two to three days during each menstrual cycle. This usually happens around two weeks after the start of your last period.
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 bit challenging to do in your head, there are free online calculators like the one below, or you can text us at (719) 694-3201.
Again, this is just a rough approximation. Keep in mind that every woman's menstrual cycle and ovulation window are unique. Some women may ovulate for longer periods, while others may experience ovulation earlier or later in their cycle.
Additionally, sometimes sex before the ovulation window begins can still lead to pregnancy. That is because sperm can survive for up to five days, meaning pre-ovulation sperm can still fertilize an egg if it lasts long enough.1, 2
Conception Calculator
Conception Date from Ultrasound
Another way to estimate the conception date is through an ultrasound. Since fetuses grow at a relatively consistent rate, their age can be measured directly, making an ultrasound a more accurate method for determining a date range than an ovulation calculator.
Having an ultrasound not only helps you know when you conceived but can also verify the health and viability of the fetus, ensuring that the pregnancy has not miscarried and is not ectopic.3
You can have an ultrasound performed at your local OBGYN office; however, paperwork, insurance, and billing are usually involved. Alternatively, your local pregnancy center may be able to offer free ultrasound services 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 (719) 694-3201 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