This is the final week. The baby is fully developed and ready to go!!!
This is the last week of menstrual cycle.
When the bleeding starts thats concidered the first day.
Week 2 - Fertilization
The sperm fertilized the egg abd the cell begins to divide rapidly. 36 hours after fertilization occurs the cell travels down the fallopian tube.
The cell begins to divide after fertilization. After 80 hours after ovulation and dividing the call has all 46 chromosomes and travels down the fallopian tube. Then the embryo burrows into the uterus.
Week 4 - implantation
After the embryo is implanted into the wall of the uterus it is called a blastocyst. This will cause the hormone human gonadotrophin to be released in to the blood stream. This hormone tell the uterus to stay in place for the growing blastocyst.
The embryo is beginng to develope along with the placenta. The embryo starts recieving nutrients and oxygen. The menstrual cycle has stoped.
Although the embryo is just the size of a raisin is starts developing spinal cord, 5 parts of the brain, eye sockets, blood vessles and blood cells. The heart is also developing and starting to beat.
The legs and arms are beginng to form. Organs are also start to form like the lungs and liver.
The embryo is starting to practice moving. mouth and teeth are starting to from.
The main construction the heart is made. The tounge and larynx is developing. Also the eye lids were forming.
The embryo is now called a fetus. The muscles are mostly developed.The fingerprint can now be seen.
The fingers and toes are seperate now. The cartlige is becoming bone. The taste buds are forming.
The fetus finger and toe nails are formed. The fetus can also feel pain. It can also suck on its thumb.
The fetus can open and close the mouth. You may also determine if the fetus is a boy or girl.
The baby can now urinate. Hairs are forming all around the body. Bones are getting more stronger.
Finger and toe nails are present, The skin is still thin. This also the beginning of 2nd trimester.
Fat is forming under the skin. The fetus can breath this helps in lung development. The fetus can also hear, sleep and dream.
The fetus eyes are senstive to light. The skeleton is getting stronger from the cartilage.
Fetus has resting and active periods. the skin is building a protective wax layer.
The fetus genitals are distinct. scalp hair is sprouting. Depending on the sex of the baby the females vagina, uterus and fallopian tubes are formed.
Week 20 - Halfway there!
The skin is getting thicker. The baby regconizes familiar sounds like mothers voice. This is also the halfway point.
Bone marrow is producing blood cells. The small intestine is absorbing sugars. The sex organs are formed.
Fetus can react to loud sounds. The baby has regular sleep and wake habits.
The baby skin pigment is forming. The eyebrows are formed. The pancreas is producing insulin for breaking down sugars.
The fetus gains 3 onces a week from here. If born at this stage then the baby can survive.
The sex organs are fully developed. The bones are hardend and hands are developed.
Week 26 - End of 2nd trimester
The fetus eyes begin to open around this time. The fetus responds to touch. Thumb sucking calms the baby.
The fetus eyes can now blink. The hearing continues to develop. The brain continues rapid growth.
The eyes are moving in sockets. The milk teeth have formed under the gums.
The fetus brain is developing neurons. The head is also getting larger. The fetus tastes and responds to pain.
The skin is smother at this point. The fetus controls its own body temperature.
The eyes are completely open now. Some oragn are almost matured lke the lungs.
The skin continues to thicken. If male the testes move down to scrotum.
The baby fuzz is disappearing. The fetus drinks about a pint of amniotic fluid and day.
The fetus would have a great chance of survial at this point. Fat keeps building up.
The lungs are fully developed. About 90% of babys live if born at the time.
The baby gains weight everyday. The baby may also go toward the birth canal at this point,
Baby should be around 7 pounds at this time. The mothers water could break at any time.
Development is complete. The main goal is building up fat. The baby is also in the final brith postion.
The uterus is very cramped at this point. The baby should come any day now.