1h 48min, feb 11, 2002 y - Day 10 the zygote forms. Implantation can cause light bleeding or spotting. Implantation bleeding can occur around the time when you expect a menstrual cycle, so you may mistake implantation bleeding for your period.
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https://www.healthline.com/health/pregnancy/8-dpo-symptomsAdded to timeline:
Date:
1h 48min, feb 11, 2002 y
Now
~ 23 years ago