Box" of Human
This stage of embryonic
development was previously
inaccessible to researchers.
By KRISTIN HOUSER
14th June 2020
Currently, scientists are only allowed to study
human embryos for up to two weeks after
an international ethical
standard known as the "14-day rule."
Now, European scientists say they have
created an accurate model of a human
embryo at days 18-21, offering researchers a
peak into what's currently considered a "black
box" in embryonic development without
violating any ethical guidelines.