Human Embryo: 6 - 7 weeks
This is an approximately 6-7 week estimated gestational age 19mm embryo from conception, 8-9 weeks from LMP. Features include finger rays and cerebral hemispheres.
This little boy is at 9 weeks gestational age of embryonic life. Note the thin amnionic cavity surrounding the embryo. Sadly, a large uterine leiomyoma precluded further continuation of this pregnancy.