Stages of Prenatal Development

Germinal

(0-2 weeks) Conception to implantation

Single cell called a Zygote, Zygote replicates itself until it forms a ball of cells with an inner and outer layer known as a blastocyst, cells start taking on specialised roles like skin or heart cells.

Embryonic

(3-8 weeks) Implantation to organ development

Most critical stage, brain and spinal cords are formed, bone begins to replace cartilage

Fetal

(9 weeks to birth) More development, sensory experiences

Largest stage characterised by rapid growth

Movement begins

Senses and organs start working

Sperm

Male sex cell

Ovum

Female sex cells

Conception process

Sperm penetrates ovum and genetic materials fuse to create a zygote

Placenta

Temporary organ attached to the fetus that becomes fully functioning at 14 weeks