Development of Fetus in First Trimester

How do first-trimester fetal development in the womb?

The first week

Currently the fetus already has all the genetic stock, a unique combination of 46 types of human chromosomes. During this period, all it takes is nutrition (through mother) and oxygen.

Week 2 and 3

Fetal size 1 / 100 inch. Tiny heart has begun beating to draw his own blood. Entering its 20th foundation day of the nervous system has also started to wake up.

Week-4

The ear begins to form (larynx and part of it). Both legs and arms began to grow. Internal organs such as pancreas, lung, and stomach are also formed. The size of the fetus (head to toe) to reach 4 to 6 millimeters.

Week-5

Physical size of the fetus to be 7 to 9 mm. His kidneys enters the final stage of development. Will the eyes, legs, and hands constantly evolving. Spinal cord and the foundation for his brain began to emerge.

Week-6

The size of the fetus reaches 8 to 11 mm. The head, thorax, and abdomen began to form. Brain wave running, beating heart helps the blood cells circulate. Existing internal organs. The process of ossification (hardening of the bone) has just begun. The flow of blood cells from the umbilical cord to the placenta starts to walk. The mouth and lips and lower jaw bone is slightly up. The hands and feet, and his fingers looked like buds.

Week-7

Development of the fetus reaches 13 to 17 mm. The fetus is able to move when palpated through the abdomen. The process of formation of the gut is almost perfect. Eyelids begin to form. Will the nose and nostril holes already there. Growing bone cells continue to form the structure of cartilage in some places.

Week-8

All structures including the arms, legs, head, brain and other organs continue to grow and evolve to establish its function. The process of bone formation has been linked perfectly. Reflexes are also already exist. The size of the fetus reached 27 â? 35 mm and weighs up to 4 grams. Fetal head in a bent position. Although still looks like a fish, a few fingers formation is already visible, as well as gender.

Week-9

The weight of the fetus reaches approximately 7 grams, and has a length of more than 35 mm. Eyelids, nose, fingers and nails are visible. The fetus was able to blink, swallow, move his tongue, and clenched his hands. The mechanism of hearing also began to develop.

Week-10

Baby’s brain now has the same structure until he was born later. The organs eye and would have been formed with perfect teeth. Head still looks bigger than other body parts. Body length reaches 45 mm.

Week-11

All organs functioning perfectly. The pancreas is able to release insulin. The feathers began to grow in the colon, ovary or pubic been formed. The heart pumps blood to perfection. The liver produces red blood cells. Fetal weights about 10 grams, body length reaches 55 mm.

Week-12

The muscles of the body helps the movement of limbs. Her fingers were perfect with concrete nails. He was able to suck his thumb, and practicing breathing with his lungs in the amniotic fluid. The kidneys are producing urine, nerves can already merasasakit, so did the spinal cord and brain stem. The length of the fetus reaches 75 mm, and weighs about 18 grams.

Body length and weight of the fetus is not always in the range as mentioned above. But those numbers are the numbers that ideal. Length and body weight is largely determined by genetic factors (inherited from her parents), nutritional intake,