How a baby is formed step by step?
Fetal development week by week
Kate Marple
By Kate Marple
| animated_fact_check Medically reviewed by Layan Alrahmani, M.D., ob-gyn
| December 1, 2021
From conception to labor, your baby is constantly growing and developing. Your baby moves through different stages, starting as a blastocyst, then maturing into an embryo, and then a fetus. Around the