Entering the second trimester, the fetus grows stronger and require nutrients in greater numbers to grow. In the thirteenth week, early fetal age 4 months, the fetus has been able to blink your eyes and feel the light stimulation. In addition, the fetus can hear the mother's heartbeat. The placenta begins to form. The length of the fetus reached 7.5 cm in internal organs which begin to function properly. At 4 months of fetal age, the vocal cords had begun to form fruit buds and twenty teeth. Fingers are separated perfectly. Fourteenth Sunday, gender has been formed, so was able to distinguish between male or female. Fifteenth Sunday, weight 114 grams and 15 cm long, fine hairs start body. Sixteenth Sunday, length 16 cm and weighing 135 grams, fetal movement more agile and active.
Fetus 5 months, entered the seventeenth week, the growth of the fetus causes the uterus getting bigger to heartburn mother's urging. Baby's skin begins to grow transparent vessel filled with blood. Entering the eighteenth week, the fetus is able to move the organs of the body such as hands, feet, and rotates with the active. Fetal weight of 150 grams. In addition to the voice of the mother, the fetus has been able to capture sound from outside. Nineteenth Sunday, 23 cm long and weighs 200 grams, millions of motor neurons in the brain has been formed. Sunday the twentieth, the more complete body skin. Two layers of the epidermis and dermis has been formed. Fingerprints were already visible. At the fetal age of 5 months, actively growing fetus moves. Average fetal movement 200 times a day. But not much that can be felt maternal.
The fetus of 6 months, at this point the fetus to grow to 33 cm long and weighs 575 grams. Besides votes from the outside, the fetus had been able to capture the feelings of mothers with very sensitive, if the mother stress, sad, or happy, the fetus was also felt. Sunday the twenty-first, fetal organs have the function of maturation. Sunday twenty-two, fetal movement becomes more limited because of the increasingly narrow space. Sunday twenty-three, the size of the head and body increasingly appears balanced. Sunday twenty-four, the organ of hearing has been perfect. So that the fetus is able to follow the rhythm of the music or kick when she heard the preferred or not preferred. In this second trimester, the fetus begins to have a regular pattern of movement, such as when to sleep and when to move. This will be felt by the mother.
In this second trimester, the fetus continued to show active movement. Mothers need to be careful and alert to feel the beat of a routine and a motion of the fetus. Because if not maintained, the fetal placental cord can be easily entangled as an aggressive movement.
