Fetal Development Week by Week Overview
Video Overview & Insights
The embryonic stage of development begins at day 15 after conception and continues through week 8. Basic structures of all major body organs and the main external features are completed during this time period, including internal organs. By week three the brain spinal cord and heart begin to develop along with the gastrointestinal tract. Here, the neural tube forms which later becomes the spinal cord. Also, leg and arm buds begin to appear and grow out from the small body. In week four the brain begins to differentiate and the limb buds grow and develop more. In week five, the heart now begins to beat a regular rhythm. Beginning structures of the eyes and ears are noticeable. Some cranial nerves are now visible and muscles connect to nerves. In week six, the formation of the lungs begins and fetal circulation is established. The liver begins producing red blood cells and the brain develops further. Here, the primitive skeleton forms and the central nervous system is now detectable with brain waves. In week 7, we see a straightening of the trunk. Nipples and hair follicles form, along with elbows and toes. Arms and legs begin to move more frequently and the diaphragm is formed. The mouth and lips become visible along with early tooth buds. In week 8, there is a rotation of the intestines and facial features continue to develop. The heart development is now complete and the embryo begins to resemble a human being. In weeks through 12, sexual differentiation continues. Buds for all 20 temporary teeth are now laid down and the digestive system shows activity. In this stage, the head makes up nearly half the size of the fetus. The face and neck are well formed and the urogenital tract completes its development. Red blood cells are produced in the liver and urine begins to be produced and excreted. The fetal gender can be determined by week 12 using an ultrasound, which will also reveal limbs that are long and thin and digits that are well-formed. In weeks 13-16, a fine hair called lanugo develops on the head. The fetal skin is almost transparent as bones become harder. The fetus makes active movements and sucking motions are made with the mouth. The fetus swallows amniotic fluid and external genitalia are recognizable at this stage. Fingernails and toenails are also present as the fetus's weight quadruples. It is usually during this phase that fetal movement, also known as quickening, is detected by the mother. Weeks 17-20 show a rapid brain growth with fetal heart tones that can be heard with a stethoscope. The kidneys will continue to secrete urine into the amniotic fluid. The vernix caseosa, which is a white greasy film, now covers the fetus. The eyebrows and head hair may appear and brown fat is deposited to help maintain the fetus's temperature. Muscles are well developed and nails are present on both fingers and toes. During weeks 21-24, eyebrows and eyelashes are well-formed. The fetus has a hand grasp and startle reflex. Alveoli begin forming in the lungs and skin remains translucent and red. The eyelids still remain sealed and the lungs begin to produce surfactant. During weeks 25-28, the fetus reaches a length of about 15 inches. There is a rapid development of the brain and eyelids are able to open and close. The nervous system is now able to control some of the functions of the fetus. Fingerprints are also set. Subcutaneous fat is now visible under the skin. Blood formation shifts from the spleen to bone marrow and the fetus usually assumes a head down position. In weeks 29 to 32, there is a rapid increase in the amount of body fat. There is an increased central nervous system control over body functions and rhythmic breathing is now established. However, the lungs are not fully mature. Pupillary light reflex is now present and the fetus stores iron, calcium, and phosphorus. During weeks 33-38, the testes are in the scrotum of the male fetus. Lanugo begins to disappear. The fetus has a good strong hand grasp reflex and increases in body fat. Earlobes are formed and firm. Fingernails reach the end of the fingertips and small breast buds are present on both sexes. The mother supplies the fetus with antibodies against disease. The fetus is considered full-term at 38 weeks, when the fetus fills all the available space in the uterus.
God is Amazing
More User Perspectives
My baby died at 6 week in my womb😢
@cheerfulvibe308828 weeks pregnant today ❤ just entered the 7th month and third trimester. My husband and I have had 4 losses over the last 13 years and our developing daughter is a true miracle for us. ❤ May all of us Moms have happy healthy births ❤
@TheChroniclesOfYarniaAllah is the greatest ❤❤❤❤❤❤
@Alishah786zeBerhenti halaman najis Babel tenggelam bau kontol2 basin susu tempek basin airnya dibabel tidak bisa bangkit amin karena berhenti jijik bayi najis kalian mbrodol semua kota besarnya di bumi tidak bisa bangkit amin karena Ratu Dan catrin pengantin perempuan mempelai anak domba punya lampu dan sinar minyak wangi dibuat nganggur susu tempek basin airnya isi sperma basin kontol basin baunya dibabel tidak bisa bangkit amin
@CatharinaCatrin-r2oI'm 6 week pregnant ❤
@prithwirajbiswas881I am 22 week and 2 day pregnent❤❤
@VichuBaluI'm week 5❤
@user-eo5yf7nq8pShe’s so uneducated on how the The development of a baby, from conception to birth, is a fascinating process that involves several distinct stages. As a matter of fact, embryo develops rapidly, forming all the major organs and body systems. This is the time when the brain and spinal cord), heart, and other structures have taken shape and at 10 wks already has a heartbeat; clearly something she lacks. You may not even know you’re pregnant still at this stage. I wonder how her mothers feels while most likely watching her own offspring portraying such selfishness.
@AmericaFirst_1873I am 3 weeks pregnant but today I have severe pain in my stomach i take medicines and other treatments it is harmful for my baby or not.
@Zeshanashraf314ZeshanAll glory to God
@DiannechidinmaThank you so much nice information ❤😊
@priyankapriyadarshini5981Hi! Today, I just found out that I Am pregnant. Praying to God that my baby grows healthy and strong. Hugs to all moms
@francheskafernandez86My wife's in 6th week, having the ultrasound for first time this Tuesday :).
@pog519My wife is 7 weeks pregnant im very excited to see my baby ❤
@osuosu1308I am 5 weeks pregnant ❤
@dipanwitadhara5698I hope no one finds this offensive but I don’t get the hype. Even in my class everybody find reproduction and embryology fascinating but I can’t help but find it disgusting. I have tried just reading about it, watching videos but I can’t understand the topic because there is the repulsion at the back of my mind😔😔
@NosaEbhonuMy wife is 5 weeks pregnant and moving into the 6th.. we are so excited ❤️
@abhishekmukherjee797Currently 20 weeks with my first baby 🥰
@dayna3341I'm 37 weeks pregnant ❤
@TinaRayMusicI am so excited to see my child! This video has me so pumped!
@nickolaskossup7829This reminds me when I was inside at my stomach.
@MarMeek58Current in week 8
@FaithBless-s5tThis is dire
@Eli56748All but 16 states will let you kill it at the 2:21 time stamp. 31 states will let you kill it at the 3:09 time stamp. 26 states will let you kill it at the 3:52 time stamp. At the 5:10 time stamp; 7 states will let you kill it because it's not a person and doesn't have any rights. Amazing that with the fall of Roe v. Wade; so many people are appalled at how difficult it is to kill a fetus(baby). Just because the Federal government decided it should be up to the states. Most states still let you kill your baby but that's not good enough for those in the baby killing states because they may want to move to a non-baby killing state if they have a job change and need to kill their baby.
@bweber6256ALLAH DESCRIBED THE HUMAN DEVELOPMENT 1400 YEARS AGO IN QURAN AND HE SAID IN surah Al-Qiyamah VERSE 37-39)
:: (Had he not been a sperm from semen emitted?Then did he become a leech-like clot; then did (Allah) make and fashion (him) in due proportion.And of him He made two sexes, male and female.39)
FORTHERMORE, ALLAH SAID IN (SURAH Al-Mu’minūn VERSE 14) Then We made the Nutfah into a clot (a piece of thick coagulated blood), then We made the clot into a little lump of flesh, then We made out of that little lump of flesh bones, then We clothed the bones with flesh, and then We brought it forth as another creation. So blessed be Allah, the Best of creators.14
FORTHERMORE ALLAH SAID ) Say it is He Who has created you, and endowed you with hearing (ears), seeing (eyes), and hearts. Little thanks you give.[ الملك: 23]
CHECK HERE ( Embryology in the Qur'an lecture by Dr. Keith L. Moore (University of Illinois, 1990)
"Embryology in the Qur'an" - is a two part lecture delivered by Dr. Keith L. Moore at the University of Illinois, Chicago, USA on the 8th May 1990. Dr. Moore is a professor emeritus in the Division of Anatomy within the Department of Surgery's Faculty of Medicine, at the University of Toronto, Canada. He has contributed to numerous publications and texts, which include The Developing Human and Before We are Born.
IF YOU WANT MOR INFO JUST REPLAY....😍😍😍😍😍😍😍😍
9th week 😊
@mrperfect3870Currently 7 weeks pregnant today 🥰
@Mariah.BriannaI'm 33 Weeks pregnant atm and excited!
@alerishadona4024Subhanallah
@pillykabesha715Currently 4 weeks pregnant. To God be all the glory!!! Have our first ultrasound at 6 weeks and 5 days. It’s on Valentine’s Day lol
@ShalomfriendI’m 5 weeks pregnant tomorrow 🥰❤️
@claudiamartin8569I’m gonna be an uncle in 4 months
@ry64209La revolución dinosauria
@margarciabruna8675So. You’re a blatant liar about. All of this almost.
Like, it takes a few minutes to research fetal development, but you re just lying about the time frame? Where are you getting your sources?
You call yourself a scientist, but mislead in each of your videos.
Hmm…where are your sources?
That’s all I want. Your medical sources to claim what you claim in this video.
I am 8, going on 9 weeks soon ❤ so excited for my little one
@emilye.8779IAM 17 weeks now
@jeffreymanalo3200I’m 5 weeks!
@kykycullio2866And certainly did We create man from an extract of clay.12. Then We placed him as a sperm-drop in a firm lodging. 13. Then We made the sperm-drop into a clinging clot, and We made the clot into a lump [of flesh], and We made [from] the lump, bones, and We covered the bones with flesh; then We developed him into another creation. So blessed is Allah, the best of creators. 14. [ Surat Al-Mu’minūn ]
@Nurse-20I m 7 week pregnant twice
@ambikaloky2722In a 10 week
@HoaNguyenViet-e8fPro-choicers should watch this video.
This literally proves a fetus is not only alive but a person
Pixocut
@kevinvel887620 weeks 🥰
@AnitaHolcombe-he3vwIam exactly 3 weeks pregnant today
@namalebeatrice2279Holding my baby how far he's come
@kytrpekka5750amazing process of creation. and a nice video, thanks, except for the shocking claim at the start. how could this incredibly well-planned and astonishingly well-executed process be result of random evolution...impossible.
@umeyyeisrayazicioglu7313Deuterostomia
@MockmillMcMamel❤️
@anupamroy.12Is it true a human fetus develops and loses vestal gill slits, a reptilian tail and has a full coat of hair which is also lost?
@soslothful