Surse de informare:
1. The Stages of Embryo Development - pathfertility.com/the-stages-of-embryo-development/
2. Fetal Development - my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth
3. Stages of Prenatal Development - verywellmind.com/stages-of-prenatal-development-2795073