When Did I Conceive?

So, you're pregnant. But when did you conceive, and how can you figure out who the father is? Need answers now? Chat anonymously with a nurse for no cost at (254) 452-5250. 

While there’s no hard science to find the absolute moment of conception, like with your period, there are timed rhythms and cycles that can help you determine – with close proximation – when you conceived.

What Date Did I Conceive?

Whether you're 2 or 20 weeks along, a little simple math can help you estimate when you conceived.

Typically, ovulation—the time when you can become pregnant—happens about two weeks after the start of your last period and lasts for about two to three days each cycle.

Conception Date Calculator

By calculating from your last period, you can estimate your ovulation window and roughly determine when you conceived.

If the math feels a bit tricky, you can use free online calculators or reach out to us via text at (254) 452-5250 for assistance.

Remember, this is a general estimate. Every woman’s menstrual cycle and ovulation patterns vary. Some women have longer ovulation periods, and cycles can vary in timing. Additionally, sperm can survive for up to five days, so intercourse before ovulation can still result in pregnancy if the timing aligns.¹²

Conception Calculator

Conception Date from Ultrasound

Another method to pinpoint the conception date is through an ultrasound. Fetuses develop at a steady pace, allowing for precise measurement of fetal age. This makes an ultrasound a more accurate tool than an ovulation calculator for estimating conception.

In addition to dating the pregnancy, an ultrasound can confirm the health and viability of the fetus, ensuring that the pregnancy has not miscarried and is not ectopic.³

While ultrasounds are typically conducted at your local OBGYN office, they often involve paperwork and billing procedures. Alternatively, your local pregnancy center may be able to offer no-cost limited 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 text (254) 452-5250, and a real, certified nurse will 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