Can you get pregnant after staying in the same room for five days?

Patient's question:

No

Doctor's answer:

On days 6–7 after fertilization, the entire blastocyst burrows into the endometrium by days 11–12.
Implantation site: Fundus or upper body of the uterus, with the endometrium in the secretory phase.
Implantation process: The polar trophoblast of the blastocyst contacts the endometrium and secretes proteolytic enzymes to dissolve the endometrium, forming a gap. The blastocyst gradually burrows into the endometrium through this gap, while the epithelial gap is repaired by proliferation from nearby tissues.