Physical Development

When is the Germinal Stage?

0-2 Weeks

Germinal Stage

The initial stage of prenatal development is where the zygote transforms into a blastocyst through rapid cell division.

Cell Divison

Process of making new body cells

When is the Embryonic Stage?

3-8 Weeks

Embryonic Stage

Stage in prenatal development where the embryo experiences significant growth and vulnerability

What is developed in the embryonic stage?

Limbs, facial features, and sexual differentiation.

When does the heart start beating?

9th week

When is the fetal stage

9th week (lasting 40 weeks)

Fetal Stage

The stage of prenatal development where the fetus grows rapidly gains movement capability

When can the baby be born early and still be able to live?

25th week (Fetal Stage)

Teratogens

Environmental factors that can negatively impact prenatal development (mental health, diet, and substances)

Fetal Alcohol Spectrum Disorder:

Physical changes, malformations, and cognitive changes due to alcohol consumption

Depends on when the mother consumed alcohol and at what point

When is brain Development

18 days after fertilization

Proliferation

Growth of tissue cells that begin day 18 - 6months

Migration

Cells from original place to another which starts in 4th month

Why is it important for doctors to test for reflexes?

Exists in the first 6 months at birth and doctors test if these reflexes are present to find damage to neural development

Sucking Reflex

When the roof of the baby's mouth is touched, the baby will start to suck

Rooting Reflex

Stroking the infant's cheek which causes the baby to turn its head towards the side that was stroked and open its mouth

Grasping Reflex

When an object is placed in an infant's palm or sole of the foot, they will automatically grasp it with their fingers or toes.

Moro Reflex

Sudden loss of support or by a loud noise, causing the infant to arch their back, throw back their head, and extend their arms and legs.

Babinski Reflex

Stroking the sole of the foot, which causes the big toe to extend upward and the other toes to fan out