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Fertilization
The egg is fertilized by the sperm, which has travelled from the vagina, through the cervix, past the uterus and then finally into the oviducts to fertilize the egg. -
The Zygote
Once the egg is fertilized, An electrical charge is sent out and hardens the outside shell to prevent other sperm from penetrating the egg. The nucleuses of the egg and the sperm cell fuse together to become the zygote. -
The Morula
After it is fertilized, the zygote becomes a morula, and continues to travel up the oviducts to the uterus by the beating cilia. It is starting to grow by mitosis -
The Blastocyst
From day 4 to 11, the morula transforms into the blastocyst and has reached the uterus. the blastocyst has also begun to implant itself to the endometrium, where it will be nourished. -
The Embryo
Day 12, the embryo has formed and the placenta is beginning to form. After ten weeks, the placenta is fully formed. The first trimester begins -
First Trimester
All of the organs start to develop, and it very vulnerable to any environmental pollutants and also drugs, alcohol and also tobacco.A lack of essential nutrients might cause irreversible damage to the embryo. -
The Fetus
During the twelfth week, the embryo is called a fetus, and by the end of the first trimester, the fetus can move its arms, fingers, toes , and also make facial expressions. Fingertips are also seen. The second trimester begins -
Beginning of Second Trimester
The Second Trimester is from weeks 13-26 Weighs 1.6 ounces which is the same as 8 US quarter coins
It is 3.5 inches long which is the same as your index finger -Eyes and ears are developing
-Bones harden
-Muscle development continues and te baby can begin to make movements -
Middle of Second Trimester
Weighs about 10 ounces
Measures about 6.3 inches -The baby is covered in vernix caseosa, which is a white fluid that covers it to protect it from amniotic fluid
-Eyelashes and eyebrows are beginning to grow, as well as nails on fingers and toes
-Later, intestines begin to absorb small amounts of fluid
-Around week 22, the reproductive systems are shown (testes and ovaries) (Picture of week 22, size of small doll) -
End of Second Trimester
Weighs 2 pounds at the end of second semester
Measures about 9 inches -The baby has sleep and wake periods
-Able to hear voices and sounds
-The eyes open and begin to blink -
First week of third trimester
fetus looks similar to what he or she will look like at birth, except thinner and smaller. fetus now weighs about 2 pounds
measures about 10 inches (25 cm) from crown to rump -
week 30
baby continues to gain weight and layers of fat.
in preparation for respiration after birth the fetus will mimic breathing movements by repeatedly moving the diaphragm -
week 31
baby is urinating approximately several cups of urine a day into the amniotic fluid. He or she is also swallowing amniotic fluid, -
week 35
baby already weighs about 5 pounds, 5 ounces (2,400 grams) -
week 38
baby weighs about 6 pounds, 6 ounces (2,900 grams) by now and measures about 13.4 inches (34 cm) in length from crown to rump. Fat is still accumulating, though -
week 40
born at 40 weeks weighs, on average, about 7 pounds, 4 ounces (3.300 grams) and measures about 20 inches (51 cm). -
Baby is Born!
