Implantation Timing Calculator

Who this is for

Adults seeking general information about possible timing after ovulation. Not a test of pregnancy or viability.

How it works

Display ovulation + 6 through + 12 days, with + 8 through + 10 days shown as common timing in the cited study. The Wilcox study used first urinary hCG detection as a proxy for implantation; it does not provide an individual prediction.

Keep in mind

• A date cannot detect implantation. Spotting and symptoms cannot establish the date or pregnancy outcome.
• Calendar estimates cannot confirm ovulation or pregnancy and must not be used to label any date pregnancy-safe.
• Irregular cycles, hormonal contraception, postpartum changes and perimenopause can make cycle-date predictions unreliable.

Sources

• Wilcox et al. (1999): time of implantation of the conceptus (opens in a new tab)
• NHS: when to take a pregnancy test (opens in a new tab)