The development of the fetus in early pregnancy is not growing , because every time a woman experiencing menstruation , the body has to prepare for pregnancy . Therefore, it is important for you to record any of your natural menstrual period , so that later you can see the development of the fetus from time to time .
As mothers , not only do the preparation for any child's growth after birth , fetal development during pregnancy also should look. In medical , gravida pregnant women referred to her unborn baby is called an embryo ( in the early days of pregnancy ) , and hereinafter referred to as the fetus ( until the time of birth ) .
The gestation period is divided into two , namely the stage of gestation and fetal period . The gestation period is a phase of pregnancy from the last menstrual period . While the fetal period is the actual baby's growth phase . So the outline development of the fetus can be seen from the second phase .
In general, based on the reference fetal development than during fetal gestation . The development of the fetus can also be divided by trimester , with each trimester ranged between 12-14 weeks or less than 3 months . How is the development of the fetus in each trimester ?
The first trimester of fetal development takes place in the first week until the thirteenth week .
Second trimester of fetal development take place until the end of the twenty-sixth week .
Third trimester of fetal development ended around the third week to the fourth week -eight -two .
However, the development of the fetus for each pregnancy can be different in terms of the size of the fetus . The following information is divided based on fetal development trimester , starting from the first trimester to the third trimester . The development Fetus First Trimester , Week 1 To Week 13
Weeks 1 and 2 . Early fetal development in the form of menstrual period that just ended , and your body is ready to ovulate . For most women , ovulation occurs on day 11-21 after the first day of the last menstrual period .
During intercourse , hundreds of millions of sperm into the vagina . Sperm to penetrate the cervix and fallopian tubes Sperm secrete enzymes that can penetrate the protective layer of the egg. If one sperm successfully penetrates the egg , the chemical changes will occur that prevents other sperm enters the egg . If fertilization occurs, the sperm into the egg cell then divides into a set containing 46 chromosomes called a zygote .
The fertilized egg to the uterus continues to run while splitting into cells called morula . Morula becomes a blastocyst which then end up in the uterus . Six to twelve days after fertilization , the blastocyst will attach to the uterine wall and begins the phase of fetal development , called embryonic
Week 3 . The development of the fetus at 33 weeks is indicated by e mbrio start developing forms part of the brain , spinal cord , heart , and gastrointestinal tract .
Week 4 and 5 . Fetal development at week 4 and week 5 in the form of an arm and leg buds begin to appear . The heart begins to beat . The placenta begins to form and produce important hormones , including HCG . The basic structure of the ear and the eye begins to form .
Week 6 . Formation lungs , jaw , nose , and oral cavity begins to form . Shoots in the hands and feet began to separate which will become the fingers and toes . Fetal development at week 6 was also characterized by the brain started to evolve into more complex parts . In this week , vaginal ultrasound can detect the heartbeat of the embryo . The embryo is about 1cm .
Week 7 . Fetal development at this week entered an important phase , namely the formation of the essential organs in the body are super tiny . Hair follicle , eyelashes , and the tongue begins to form . Elbows and toes are starting to look more clearly because the more elongated buds branch .
Week 8 . Fetal development is characterized by the ear continues to grow both internally and externally . Everything in the adult human body is now in the embryo . Bone begins to form , and muscles begin to contract . The face of the embryo becomes more detailed , and more noticeable eyelids . The embryo is at the late phase of embryonic and fetal soon enter phase . The embryo is about 2.5 cm .
Sunday 9-13 . Fetal development at this week increased by about 7.5 cm . Genitals begin to form , but it is not clearly visible on ultrasound . Her eyelids are still closed and will open on the 28th week . The fetus can start a fist and tooth buds begin to appear . Great big half of the fetal head . Developments Second Trimester Fetus , Week 14 Until Sunday 26th
Sunday 14-16 . Fetal skin looks transparent and fine hair called lanugo begins to form in his head . The fetus begins to start to suck and swallow some amniotic fluid . Fetal development at this week include the formation of fingerprints and sweat glands . The fetus begins to curl and twist his body . The fetus is about 15cm .
Sunday 17-20 . Mother increasingly feeling the baby move . Eyebrows and eyelashes have grown , so too with nails on fingers and toes . Fetal development in the skin begin to more complex organs , characterized by the formation of vernix . Vernix is a substance that protects the skin from the amniotic fluid fetal fetal heartbeat can be heard from the fetal stethoscope length reaches 20cm .
Sunday 21-23 . Lanugo now covers the entire body of the fetus . The development of the fetus begins to resemble a baby because his skin has become less transparent . Fat in the skin also begins to form . All components of the eye has evolved . Another important in fetal development this week is liver and pancreas emerging complex . In this week approximately 25-27 cm long fetus .
Sunday 24-26 . If the fetus is born prematurely trigger on this week , he can survive with the help of technology . The fetus begins to have time to sleep and waking routine every day , and the mother can feel it . Fetal sleep time is much longer than the time of preservation . The fetus begins to be surprised . Another important development of the fetus is the air sacs in the lungs begin to form , the brain is growing rapidly , and the nervous system that have been able to control some functions . Now , the fetus is about 35cm . Fetal development of the Third Trimester , Week By Week 27, 40
Sunday 27-32 . The fetus begins to develop fully , especially in weight because the body stores fat . Fetus size 38 - 43cm . Fetal development in the immature lungs completely , but have started regular breathing rhythm . The bones have fully developed while still soft . The fetus is now storing calcium , iron , and phosphorus in the body itself . Fetus eyelids open .
Sunday 33-36 . This was the time the fetus begins to rotate his head down in preparation for birth . The weight of the fetus is growing rapidly . Lanugo begins to disappear . Now fetus measuring 40 - 48cm .
Sunday 37-40 . The days of waiting mothers coming to an end . Fetal development has been perfect . At week 38 , the fetus is fully developed and ready for birth . Possible future mother began to feel a decrease in fetal movement as the movement of the fetus is getting narrower with increasing size of the fetus .
Fetus has fingernails grow long and needs to be cut immediately after birth . Putting the fetus had seemed perfect , whatever their gender . The mother gives the baby antibodies for protection against disease . All have fully developed organs with lungs that continues to mature until the moment of birth arrived . In this phase almost born , fetus measuring 48 - 53cm .
By knowing the fetal development from week to week , at least you learn to understand how your child's prospective development before birth into the world . So , do not underestimate the future development of the fetus , especially during the early development of the fetus in the first trimester .