Germinal Stage
The first stage, from conception to about 2 weeks, when the zygote implants.
Germinal stage.
The time period
Week 3 to week 8
Third trimester of pregnancy
Fetal stage
Sight, touch, hearing, taste, smell,
Sensory development
The process of developing or being developed
Development
The time in which this stage lasts from fertilization
14 days.
Things formed from the three cell layers
Major organs and body systems.
Second Trimester of Pregnancy
Body growth begins with parts like fingers, toes, muscles, and bones.
Two major components/organ(s) in brain development
Brain and spinal cord
Before birth
Prenatal
The ending of the stage ends with
The egg implanting into the uterine wall and becomes a blastocyst.
The outermost germ layer gives rise to the skin and nervous system
Ectoderm
First Trimester of Pregnancy
central nervous system begins to development.
Foundation and structure
First semester of brain development
An offspring of a human or other mammal in the stages of prenatal development that follow the embryo stage.
Fetus
A part of this stage that is inherited by the egg
The cytoplasm.
The beginning of the embryonic stage, as the blastocyst attaches to the uterine wall.
Implantation
The time period of the Fetal Stage
The fetal stage extends from the beginning of the 9th week until about 38 weeks after fertilization.
Growth and complexity
Second trimester of brain development
(In an embryo) A hollow structure from which the brain and spinal cord.
Neural tube
The two distinct parts of the blastocyst, and what do they become
Inner cell mass and Trophoblast.
This organ, vital for nutrient and oxygen exchange, begins forming during the embryonic stage
Placenta
A key indicator of fetal well-being, with fewer than 10 in 12 hours suggesting distress.
Fetal Movements.
Rapid expansion
Third trimester of brain development
The action of process of fertilizing an egg, involving the fusion of male and female gametes to form a zygote.
Fertilization