Human Fetus Development | Journey From Fertilization to Child Birth  #fetus #sperm #egg
Channel: The Human Genome
Date: 2024-02-06

#fertilization #conception #fetusdevelopment #embryos #human #cell #dna #protein #menstruation #childbirth #labor #birth #thehumangenome #gene #placenta 
Introduction
Human Fetus development is a 40 weeks long astonishing journey that starts with the union of male sperm and female egg cell.  
Weeks 1-2: Fertilization and Early Cell Division:
"In the first two weeks after fertilization, a single cell rapidly divides into a ball of cells called a blastocyst. This tiny cluster of cells begins its journey, traveling down the fallopian tube and implanting into the uterine lining. Here, the foundations for the development of the placenta and the embryonic sac are laid."
Weeks 3-8: Formation of Organs and Tissues (Embryonic Period):
"As we progress into weeks 3 to 8, known as the embryonic period, major organs and tissues begin to take shape. The heart starts beating, limb buds appear, and the neural tube forms, laying the groundwork for the nervous system. By the end of this period, we have the blueprint for all major organ systems."
Weeks 9-12: Fetal Period Begins:
"Entering the fetal period from weeks 9 to 12, our developing fetus is now about the size of a plum. Facial features become more distinct, and the limbs continue to grow and move. During this period, the sex of the baby becomes identifiable, and its nervous system begins to function."
Weeks 13-16: Development of Senses and Movement:
"As we progress into the second trimester, weeks 13 to 16 bring about significant developments. The fetus's sensory organs, including eyes and ears, continue to mature, and it starts to make small, spontaneous movements. The mother may begin feeling the first fluttering movements – a truly magical experience."
Weeks 17-20: Halfway Mark - Recognizable Features:
"By the halfway mark, around weeks 17 to 20, the fetus becomes more recognizable. The skeletal system is forming, and the baby starts developing a fine layer of hair called lanugo. It's during this time that many mothers may undergo an anatomy scan to check the baby's health and development."
Weeks 21-24: Viability and Continued Growth:
"As we reach weeks 21 to 24, the fetus reaches the point of viability, where, with medical support, it could survive outside the womb. The organs continue to mature, and the baby experiences significant growth. The mother may begin to notice more defined patterns of movement."
Weeks 25-28: Third Trimester - Developing Senses:
"Transitioning into the third trimester, weeks 25 to 28 are marked by the continued development of the baby's senses. The eyes can open, and the baby responds to light and sound. Lung development progresses, preparing the fetus for breathing outside the womb."
Weeks 29-32: Final Stretch and Organ Maturation:
"In the final stretch, weeks 29 to 32 see the baby's organs maturing further. The bones continue to harden, and the baby settles into the head-down position, preparing for birth. The mother may experience Braxton Hicks contractions as the body gets ready for the upcoming labor."
Weeks 33-40: Countdown to Birth:
"As we approach the last leg of this incredible journey, the final weeks are a countdown to birth. The baby gains more weight, and the mother may experience a drop in the belly as the baby descends into the pelvis. The cervix begins to thin and dilate in preparation for labor."
Conclusion:
"And there you have it, a detailed voyage through the 40 weeks of human fetal development. From the microscopic blastocyst to the fully formed miracle of life, each stage is a testament to the wonders of nature.

0:01 Introduction
0:32 Weeks 1-2: Fertilization and Early Cell Division
0:59 Weeks 3-8: Formation of Organs and Tissues 
1:25 Weeks 9-12: Fetal Period Begins
1:48 Weeks 13-16: Development of Senses and Movement
2:14 Weeks 17-20: Halfway Mark 
2:40 Weeks 21-24: Viability and Growth
3:03 Weeks 25-28: Third Trimester - Developing Senses
3:27 Weeks 29-32: Final Stretch and Organ Maturation
3:50 Weeks 33-40: Countdown to Birth
4:12 Conclusion