How long after conception does implantation usually occur?

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human fetus; prenatal development — prenatal development An ultrasound image of a human fetus.

Implantation typically begins when the blastocyst comes into contact with the uterine lining approximately six to 10 days after fertilization.1

Upon reaching the uterus, the blastocyst usually remains free in the uterine cavity for about a day before attaching to the endometrium. Once contact is made, the blastocyst begins to burrow into the deeper tissue of the uterine wall. This process of invasion continues for a few days, and by the 11th day after fertilization, the blastocyst is typically completely embedded within the uterine lining.23