When does implantation happen?

Bottom lineImplantation, when a fertilized egg attaches to the uterine lining, usually happens 6 to 12 days after ovulation (most often days 8 to 10); some people notice light implantation spotting or mild cramping, but many notice nothing. Because home tests detect hCG that only rises after implantation, testing too early gives false negatives, so wait until on or after your missed period.

Implantation is when a fertilized egg attaches to the lining of the uterus, marking the start of pregnancy. It usually happens 6 to 12 days after ovulation, most often around days 8 to 10.

The timeline

1. Ovulation: egg released
2. Fertilization: within 12 to 24 hours, in the fallopian tube
3. Travel: the fertilized egg moves toward the uterus over several days
4. Implantation: it embeds in the uterine lining, about 6 to 12 days after ovulation
5. hCG rises: the pregnancy hormone home tests detect

Signs some people notice

• Implantation bleeding: light pink or brown spotting, lighter and shorter than a period
• Mild cramping
• Many people notice nothing at all - that's normal too

Why timing matters for testing

Home pregnancy tests detect hCG, which only starts rising after implantation. Testing too early gives a false negative. Wait until on or after your missed period for a reliable result.

What to do

If you're trying to conceive, note that the "two-week wait" between ovulation and a testable result reflects this timeline.

See what is implantation bleeding and how soon can I take a pregnancy test.

Femora tracks your ovulation date so you know when implantation and a reliable test window fall.