0
24 hours after fertilization:the single celled egg has split into two identical sister cells
32 hours after fertilization:the two identical sister cells have divided into four cells
36 hours after fertilization: the egg has divided into eight cells
4 days after fertilization: embryo enters the uterus at the morula stage of development
6-7 days after fertilization:the egg enters the blastula stage
7-8 days after fertilization:the blastula hatches from the pelucida
2 weeks after fertilization: the blastocyst elongates and comes in contact with the uthrine wall
14-16 days after fertilization: binucleate cells begin to differnentiate in the trophoblast
16 days afer fertilization:
20 days after fertilization: the embryo's heart begins to beat
30 days after fertiliziation: the embryo is about a ½ inch long
31-42 days after fertilization:major growth is taking place
42 days after the fertilization:the embryonic period is at an end and it is about 1½ inches long
60 days after fertilization: the fetus is about 4 inches long and eyes, eyelids, and nostrils can be identified
3 months after fertilization:the fetus is about 10 inches long and fine hair is visible on the head
145-150 days after fertilization:the lambs are born
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoIn the first week after conception the blastocyst is multiplying rapidly. It will soon divide into three layers; the placenta, which will produce hCG (human chorionic gonadotropin), the amniotic sac and the embryo. A lot of basic growth is occurring at this time, including the brain, spinal cord, heart, and gastrointestinal tract!
Wiki User
∙ 15y agoGerminal Embryonic Fetal
Wiki User
∙ 10y agogerminal, embryo, fetal
Wiki User
∙ 13y agogerminal embryonic and fetal
Add your answer:
Earn +20 pts
Does embryonic development mean the same as fetal development?
No. The embryo and the fetus are two separate stages in a baby's prenatal development.
What were the three stages of frontier development?
There are typically three stages of frontier development. These three stages are trade, settlement, and statehood and they are the stages Oregon went through.
What were the three stages of Oregons' frontier development?
There are typically three stages of frontier development. These three stages are trade, settlement, and statehood and they are the stages Oregon went through.
Why are three stages needed for development of fruit fly larvae?
The three stages that are needed for development of fruit fly larvae are molting stages, pupil stages, and metamorphosis stages.
What is the clinical relevance of the stages of prenatal development?
There are three trimester in pregnancy. Each trimester is three months. Each trimester indicates specific fetal development. Based on trimester physician can compare the growth of the fetus and see if there any abnormalities and also decide which medication to use.
Why is the period of the embryo regarded as the most dramatic prenatal phase?
It is considered as the most dramatic prenatal phase as lots of changes occur in this stage and it is also the most hazardous of the three prenatal stages because most miscarriages occur at this time
What are the early stages of human development?
1. xygote 2. gamete 3. embryo 4. fetus (also spelled foetus, fœtus, faetus or fætus) 5. infant...
How many stages are in the life cycle of the frog?
The frog has three distinct stages of development in its life cycle.
What are three stages of a babys development?
stage1 like eye, heart
What are the three stages of development of the Bible?
pload ng 20php pls??
What is the difference between prenatal and postnatal development?
distinguish between prenatal & postnatal
What is the vulnerability or prenatal development?
During prenatal development, a particular organ or body part is most vulnerable to exposure to teratogens during its:
