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Conception Calculator

Estimate when you likely conceived, your implantation window, and your due date

Four input modes: last period, due date, ultrasound, or IVF.
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21–45 typical.

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Ovulation occurs ~luteal length days before your next period. If unknown, 14 is standard.

Irregular cycles widen the estimate.

How we estimate conception and due date

We count pregnancy from the first day of your last menstrual period (LMP). That is how gestational age (GA) is recorded in obstetrics. Conception typically occurs around ovulation, about 14 days after LMP in a 28-day cycle, or earlier/later in shorter/longer cycles. Ultrasound can refine dating, especially in the first trimester. For IVF, dating uses embryo age at transfer to compute an LMP equivalent.

Accuracy and variation

Estimates can vary by several days due to cycle variability, late or early ovulation, sperm survival (up to five days), and implantation timing (commonly 6–10 days after conception).

When to talk to a doctor

Contact a clinician if you have pain, heavy bleeding, a positive test with uncertain dates, or questions about ultrasound results.

Book Doctor Consultation

You can talk to us before you visit the clinic

Frequently Asked Questions

Gestational age counts from the last menstrual period (LMP). Conception occurs around ovulation — approximately 14 days after LMP in a 28-day cycle.
A first-trimester ultrasound is the most accurate method for pregnancy dating. Later scans can provide estimates but are less precise.
If your cycles are irregular, we widen the estimated date window. An early ultrasound can help refine conception and due date timing.
Yes. You can enter your embryo transfer date and embryo age. We’ll calculate your estimated due date (EDD) and conception based on standard IVF dating.
Select “I Know My Due Date” to back-calculate your conception date and LMP equivalent.
Gynoveda can help you find the nearest clinic

Success Stories with Gynoveda across India

PCOS Warrior to Proud Mom: Sandhya’s Ayurvedic Success
Sandhya Kamble, 30 years
Photographer- Wedding Shoot, Baby shoot
Residence
Pune
Wife of Subham Kamble, 29 years
Sr. Sales Manager - Real Estate
Consuming Gynoveda Since
11 months
Medical History
PCOS, Irregular periods, Unhealthy Weight
Trying to Conceive Since
1 year
Sandhya, a photographer from Pune, had been battling PCOS for 15 years, enduring the frustration of irregular periods. On May 15, 2022, she got married, but her struggles intensified as she gained nea...

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Babies born naturally through Ayurveda with Gynoveda
20000+
Babies born naturally through Ayurveda with Gynoveda
Women Got Natural Cycle in 60 Days
89%
Women Got Natural Cycle in 60 Days
Trusted by Customers & Seen Effective Results
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Trusted by Customers & Seen Effective Results