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Fertilization (La fécondation), Mesoderm (mésoderme), Ectoderm (Ecdoderme)…
Fertilization (La fécondation)
Cleavage (La segmentation)
Blastocyst (Blastocyste) Formation
Implantation of the Blastocystinto the uterine wall.
Mesoderm (mésoderme)
Muscles
Bones (Os)
Blood vessels (vaisseaux sanguins)
Ectoderm (Ecdoderme)
Nervous System (système nerveux)
Skin (la peau).
Brain + Spinal Cord
Endoderm (Endoderme)
The digestive system (système digestif)
Respiratory system (système respiratoire)
Early Fetal Period (9–12 weeks):
Mid-Fetal Period (13–28 weeks):
Late Fetal Period (29–40 weeks)
The baby gains weight (prise de poids) and stores fat.
The lungs (poumons) mature, preparing the baby for breathing after birth.
Movements (mouvements): The baby begins to move
which the mother can feel.
Skin (peau): Fine hair (lanugo) covers the body.
Brain (cerveau): Rapid brain growth occurs
and the baby begins to respond to stimuli like sounds.
Heartbeats (battements du cœur) can be detected.
The baby’s face (visage) takes shape.
External genitalia (organes génitaux externes) begin to form.
Sperm (spermatozoïde)
Zygote => the fallopian tube**
Blastomers (Blastomères)
=>while traveling down the fallopian tube
Morula (a ball-like structure)
Blastocyst (a hollow structure)
Trophoblast (Trophoblaste)
Placenta
Inner cell mass (masse cellulaire interne)
Embryo
Egg (Ovule)
Gastrulation
Neurulation
Organogenesis (L’organogenèse)
Limb buds (bourgeons des membres)
=> the 5th week.
Liver (foie)
kidneys (reins)
Heart (cœur) Begins to beat by the 4th week.
Pre-Embryonic Stage (Stade pré-embryonnaire)
Embryonic Stage (Stade embryonnaire)
Fetal Stage (Stade fœtal)
The outcome
Around day 5–7 after fertilization
Day 1
Begins during the 3rd week and
Completes by the 4th week.
Week 9 to birth