embryonic development

Question

Implantation in humans typically occurs on which day post-fertilization?

RankGuru · Accepted Answer

1. **Timeline**: Fertilization usually occurs in the ampulla of the fallopian tube.
2. **Transportation**: The zygote travels toward the uterus while undergoing cleavage divisions (2, 4, 8, 16 cells).
3. **Morula to Blastocyst**: By day 4-5, it becomes a blastocyst.
4. **Implantation**: The blastocyst reaches the uterus and adheres to the endometrial wall. This attachment and embedding (**implantation**) typically occur around **Day 6 or 7** after fertilization.

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embryonic development

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