group 11. Amira Az Zahra2. Irfan Zaky H.3. M.Ghozy Ramadhansyah4. Muthia Shafa Nadhirah5. Widiyana Daniasya

The development in humans begins with the fertilization process. Fertilization process is a meeting between the egg that comes from women (mothers) with sperm from a man (father).

Sperm cell nucleus will join / merge with the egg nucleus and form a new cell called the zygote. This will always zygote splitting into two cells, four cells, eight cells, 16 cells, 32 cells, and so on. Zygote which has been split into many cells will develop into an embryo, then a fetus in the womb. The length of time the fetus grows and develops in the mother's womb, from conception to birth is

approximately 9 months.

Fertilization Process

Cell Division

It will develop into an embryo

Embryo

Characteristics: The length of baby is around 10 mm. The shape of the head, back, and heart come to sight. The mouth and the eyes take form. The legs and arms look like swollen buds.

During fetal development in the uterus is divided into three stages. The length of time in each stage is three months:A. First trimester

The first three months of the embryo develops into a fetus whose length is approximately 5.5 cm. Is shaped like a human fetus despite its enormous size. At the end of the first three months of this fetus also had begun to move their arms and legs.

Second trimesterIn the second three months, the fetus is

growing and has reached approximately the length of 19 cm. Hands and feet have grown even fingers and toes have begun to take shape, the face grows lengthwise. In the second three months of fetal heart rate have also begun to be detected. Fetal movement also become active.

Third trimesterIn the third place three months of fetal

growth in size very quickly. Is proportional to body size as a baby. Due to the larger body size, not too freely moving fetus in the womb. Before the birth of babies in general has reached a length of about 50 cm. The next baby will be born into the world and it is called as a baby.

How the fetus get the food?The fetus receives all the nutrients and

oxygen from the mother's blood supply. However, fetal blood was never directly associated with blood mother. The fetus makes its own blood and blood related to his mother through the placenta. The placenta connects the mother's uterus wall with baby's umbilical cord. Maelalui is maternal and fetal placental exchange of nutrients / foods, gas-gas and residual waste.

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