Day 1 : fertilisation
Day 6-9 : implantation into mother's uterus
Week 2 : 3 layers of cells - ectoderm, mesoderm and endoderm are formed
Week 3 : rudimentary heart beating
Week 8 : unborn embryo called a foetus
Week 19 : minimum age for a baby to be born and survive
Week 38 : baby ready to be born, lungs are fully functional
No comments:
Post a Comment