the.com/implantation

About six days after fertilization, the embryo burrows into the uterine lining, establishing the connection that pregnancy depends on.

means The process by which a fertilized embryo burrows into and attaches to the uterine lining, establishing the physical connection that pregnancy depends on.

from From Latin 'implantare' — 'in-' (into) plus 'plantare' (to plant, to fix in the ground, root of our word 'plant'). The verb traveled through French into English in general senses of 'fixing firmly' or 'inserting' long before medicine claimed it. By the 1800s, biologists and physicians borrowed the word for tissue grafts and surgical insertions, and it was a natural fit for embryology once the process of an embryo embedding in the uterine wall was understood — the oldest sense of the root, planting something so it takes hold, mapped almost too perfectly onto the biology.

timing
happens roughly 6-10 days after fertilization
spotting
light bleeding can mimic a mini period
success rate
many fertilized eggs never implant at all
hormone trigger
triggers hCG, the pregnancy test giveaway
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