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Week 5 of pregnancy
The Embryo is 1/16th to 1/8th inch long. A bunch of cells have formed into a C-shape, and there is a groove on the Embryo's back that will eventually seal and develop into the neural tube -
Week 6 of pregnancy
The heart of the Embryo begins to pump blood, and the neural tube that will become the spine closes. Arm and leg buds begin to form. -
Week 7 of pregnancy
The head is about 1/3rd the size of the entire Embryo. The brain and face are developing rapidly. -
Week 8 of pregnancy
Brainwave activity begins. webbed fingers and toes begin to form, and subtle movements begin. -
Week 9 of pregnancy
Now being called a Fetus, The heart of the Fetus is almost completely developed, and the arms develop bones. -
Week 10 of pregnancy
Eyelids begin to fuse to protect eyes. The Fetus begins doing occasional breathing movements even though it gets its oxygen through the umbilical cord. -
Week 11 of pregnancy
Nearly all the organs and body structures are formed and starting to function. Genitals start taking form of specific gender of Fetus. -
Week 12 of pregnancy
The growth of the Fetus' head slows down to let the rest of the body grow. Arms, legs, and fingers are starting to resemble a newborn's. -
Week 13 of pregnancy (end of 1st trimester)
Face starts developing individual characteristics, and Fetus starts developing muscles and joints. -
Week 14 of pregnancy
The Fetus can wince and grimace due to facial muscles developing and flexing. The liver starts to secrete bile. -
Week 15 of pregnancy
The nose, lips, and taste buds are formed, and the head is covered by a fine, soft hair called Lanugo -
Week 16 of pregnancy
The Fetus' bone begins to harden. -
Week 17 of pregnancy
Brown fat, a special type of fat is being dispersed to help the Fetus with body heat generation. -
Week 18 of pregnancy
Teeth have started to form in the Fetus, and can also start to hear sounds. -
Week 19 of pregnancy
genetic material for future grandchildren begin to develop. -
Week 20 of pregnancy
A white substance called Vernix Caseosa protects the skin from its aqueous environment, and the Fetus' sweat glands form. -
Week 21 of pregnancy
Taste buds are forming on her tongue. The eyelids are still sealed, but the eyes are active. -
Week 22 of pregnancy
The organ system is becoming more functional and specialized. -
Week 23 of pregnancy
The eyes are formed, but lack pigmentation -
Week 24 of pregnancy
Real hair begins to grow on the head, and the skin becomes less translucent. -
Week 25 of pregnancy
The Fetus starts exhibiting sleeps by having active and inactive periods. -
Week 26 of pregnancy (end of second trimester)
The eyelids separate causing the eyes to open. the sense of sight and sound expand greatly for the Fetus. -
Week 27 of pregnancy
Everything still developing for the Fetus in the womb. -
Week 28 of pregnancy
The Fetus can taste and smell, and the eyes can produce tears. -
Week 29 of pregnancy
The Fetus' adrenal glands are producing a chemical which can be made into serial by the placenta. -
Week 30 of pregnancy
Fetus' eyes are able to track light while the brain continues to rapidly develop. -
Week 31 of pregnancy
The Fetus is not really developing anything new, while other human functions are still trying to form. -
Week 32 of pregnancy
All five senses are developed, and sleep begins for the Fetus. -
Week 33 of pregnancy
The Fetus is in the process of receiving antibodies from the mother due to its immune system still being immature. -
Week 34 of pregnancy
The Fetus can blink, and the brain is developing fast while in the womb -
Week 35 of pregnancy
The nervous and immune system are still maturing. -
Week 36 of pregnancy
The Fetus is usually 20.5 inches in length. -
Week 37 of pregnancy
Fetus begins to move into delivery position. Fetus intestines build up meconium to release as a bowel movement. -
Week 38 of pregnancy
Nails are done growing. -
Week 39 of pregnancy (end of 3rd trimester)
The Fetus adds neural connections, hair, and weight, and is almost primed for birth. -
Week 40 of pregnancy
Fetus is fully formed, and ready for birth.
