Skip Navigation
Improving lifelong health one pregnancy at a time.
English
Español
Português
Educator Login / Register
Donate Now
Get Free Videos
Your Life Before Birth Video
Free Mobile Apps
Get Free EHD Videos
When Health Begins
The Virtual Human Embryo
Prenatal Development DVD
Image Gallery
Movie Theater
DVD Documentation Center
Multilingual Illustrated DVD
Introduction
0 - 4 Weeks
4 - 6 Weeks
6 - 8 Weeks
8 Weeks
8 - 12 Weeks
3 - 4 Months
4 - 6 Months
6 Months - Birth
Educator's Corner
Classic Works
Prenatal Summary
Prenatal Timeline
Prenatal Overview
EHD Store
About EHD
Support EHD
Sections
Home
›
Multilingual Illustrated DVD
Multilingual Illustrated DVD
[Tutorial]
The Biology of Prenatal Development
Introduction
0 - 4 Weeks
4 - 6 Weeks
6 - 8 Weeks
8 Weeks
8 - 12 Weeks
3 - 4 Months
4 - 6 Months
6 Months - Birth
生前発育の生物学
.
日本語
[Japanese]
This program is distributed in the U.S. and Canada by National Geographic and EHD.
[
learn more
]
[
hide
]
To purchase online:
visit
EHD's Online Store
To purchase online:
visit
EHD's Online Store
Choose Language:
88 languages available
Afrikaans
Albanian (Tosk) [Shqip]
Arabic [عربي]
Armenian [Հայերեն]
Assamese [অস]
Azerbaijani North [Azərbaycan Dilində]
Belarusian [Беларуская мова]
Bengali [বাং]
Bosnian [Bosanski]
Bulgarian [Български]
Catalan [Català]
Creole (Haitian) [Kreyòl Ayisyen]
Croatian [Hrvatski]
Czech [Česky]
Danish [Dansk]
Dutch [Nederlands]
English
Estonian [Eesti]
Finnish [Suomi]
French [Français]
Ganda [Luganda]
Georgian [საქართველო]
German [Deutsch]
Greek [Ελληνικά]
Gujarati [ગુજરા]
Hausa
Hebrew [עברית]
Hindi [हिन्दी]
Hungarian [magyar]
Igbo
Indonesian [BAHASA INDONESIA]
Italian [Italiano]
Japanese [日本語]
Javanese [Basa Jawa]
Kannada [ಕನ್ನಡ]
Kashmiri [کشمیری]
Kazakh [Қазақ]
Kinyarwanda
Kirundi (Rundi) [Kirundi]
Korean [한국어]
Krio
Kurmanji [Kurmancî]
Kyrgyz [Кыргыз]
Latvian [Latviski]
Lithuanian [Lietuvių kalba]
Macedonian [Македонски]
Malagasy
Malay [Bahasa Melayu]
Malayalam [മലയാളം]
Mandarin (Simplified) [中文(简体)]
Mandarin (Traditional) [中文 (繁體)]
Marathi [मराठ]
Mongolian (Khalkha) [Монгол]
Nepali [नेप]
Norwegian [Norsk]
Pashtu (Pushto) [پښتو]
Persian [فارسی]
Polish [Polski]
Portuguese [Português]
Punjabi, Eastern [ਪੰਜਾਬੀ]
Punjabi, Western [پاکستانی پنجابی]
Romanian [Română]
Russian [Русский]
Serbian [СРПСКИ]
Shona
Sindebele (Ndebele) [Ndebele]
Sindhi [سندھی]
Slovak [Slovenčina]
Slovenian [Slovenščina]
Somali
Sorani [كوردی]
Spanish [Español]
Swahili
Swati (siSwati) [Siswati]
Swedish [Svenska]
Tagalog
Tajik [Тожик]
Tamil [தமி]
Telugu [తెల]
Thai [ไทย]
Turkish [Türkçe]
Turkmen [Türkmençe]
Ukrainian [Українська]
Urdu [اردو]
Uzbek [Ўзбек]
Vietnamese [tiếng Việt]
Yoruba
Zulu [isiZulu]
Download English PDF
Download Spanish PDF
Download French PDF
What is PDF?
Hide Table of Contents
Show Table of Contents
Table of Contents
Chapter 1 – Introduction
Chapter 2 – Terminology
THE EMBRYONIC PERIOD (THE FIRST 8 WEEKS)
EMBRYONIC DEVELOPMENT: THE FIRST 4 WEEKS
Chapter 3 – Fertilization
Chapter 4 – DNA, Cell Division, and Early Pregnancy Factor (EPF)
Chapter 5 – Early Stages (Morula and Blastocyst) and Stem Cells
Chapter 6 – 1 to 1 1/2 Weeks: Implantation and Human Chorionic Gonadotropin (hCG)
Chapter 7 – The Placenta and Umbilical Cord
Chapter 8 – Nutrition and Protection
Chapter 9 – 2 to 4 Weeks: Germ Layers and Organ Formation
Chapter 10 – 3 to 4 Weeks: The Folding of the Embryo
EMBRYONIC DEVELOPMENT: 4 TO 6 WEEKS
Chapter 11 – 4 Weeks: Amniotic Fluid
Chapter 12 – The Heart in Action
Chapter 13 – Brain Growth
Chapter 14 – Limb Buds and Skin
Chapter 15 – 5 Weeks: Cerebral Hemispheres
Chapter 16 – Major Airways
Chapter 17 – Liver and Kidneys
Chapter 18 – Yolk Sac and Germ Cells
Chapter 19 – Hand Plates and Cartilage
EMBRYONIC DEVELOPMENT: 6 TO 8 WEEKS
Chapter 20 – 6 Weeks: Motion and Sensation
Chapter 21 – The External Ear and Blood Cell Formation
Chapter 22 – The Diaphragm and Intestines
Chapter 23 – Hand Plates and Brainwaves
Chapter 24 – Nipple Formation
Chapter 25 – Limb Development
Chapter 26 – 7 Weeks: Hiccups and Startle Response
Chapter 27 – The Maturing Heart
Chapter 28 – Ovaries and Eyes
Chapter 29 – Fingers and Toes
THE 8-WEEK EMBRYO
Chapter 30 – 8 Weeks: Brain Development
Chapter 31 – Right- and Left-Handedness
Chapter 32 – Rolling Over
Chapter 33 – Eyelid Fusion
Chapter 34 – "Breathing" Motion and Urination
Chapter 35 – The Limbs and Skin
Chapter 36 – Summary of the First 8 Weeks
THE FETAL PERIOD (8 WEEKS THROUGH BIRTH)
Chapter 37 – 9 Weeks: Swallows, Sighs, and Stretches
Chapter 38 – 10 Weeks: Rolls Eyes and Yawns, Fingernails & Fingerprints
Chapter 39 – 11 Weeks: Absorbs Glucose and Water
Chapter 40 – 3 to 4 Months (12 to 16 Weeks): Taste Buds, Jaw Motion, Rooting Reflex, Quickening
Chapter 41 – 4 to 5 Months (16 to 20 Weeks): Stress Response, Vernix Caseosa, Circadian Rhythms
Chapter 42 – 5 to 6 Months (20 to 24 Weeks): Responds to Sound; Hair and Skin; Age of Viability
Chapter 43 – 6 to 7 Months (24 to 28 Weeks): Blink-Startle; Pupils Respond to Light; Smell and Taste
Chapter 44 – 7 to 8 Months (28 to 32 Weeks): Sound Discrimination, Behavioral States
Chapter 45 – 8 to 9 Months (32 to 36 Weeks): Alveoli Formation, Firm Grasp, Taste Preferences
Chapter 46 – 9 Months to Birth (36 Weeks through Birth)
Chapter 40
3 to 4 Months (12 to 16 Weeks): Taste Buds, Jaw Motion, Rooting Reflex, Quickening
See Snapshots
11 ~ 12 週にかけて 胎児の体重は およそ60% 増加します
12 週をもって 妊娠初期が終わります
See Snapshots
はっきりとわかる味覚芽が 口内を覆います
出生時までには 味覚芽は 舌と口蓋の 後部に残るのみとなります
See Snapshots
早ければ 12 週に便通が始まり 6 週間ほど続きます
胎児および新生児の結腸 からの最初の排出物は 胎便と呼ばれます 胎便は 消化酵素と タンパク質および 消化器官からの死細胞で 出来ています
See Snapshots
12 週までに 上肢は 身体の大きさに最終的に 釣り合った長さになります 下肢が最終的に 釣り合った長さになるには もう少し時間がかかります
See Snapshots
背中と頭上を除き 胎児全体の身体は 軽い接触に反応します
See Snapshots
ここで初めて 性差による発達の違いが現れます たとえば 女の胎児の顎の動作は 男の胎児より頻繁です
See Snapshots
初期の体をすくめる 反応とは対照的に この時点における口の周囲の刺激は 刺激を受けた方向に顔を向け 口を開けるという動作を促します 「ルーティング反射」 と呼ばれるこの反応は 出生後も継続し 授乳の際 新生児が母親の乳首を 見つけるのに役立ちます
See Snapshots
脂肪沈着が 頬を覆うにつれて 顔立ちが しっかりとしてきます 歯の発達も 始まります
See Snapshots
15 週までには 血液を 形成する幹細胞が達して 骨髄内で増殖します 殆どの血球形成は ここで行われます
See Snapshots
動きは 6 週間の胎芽で 既に始まっているのですが 妊婦が胎動を初めて感じるのは 14 ~ 18 週にかけてです 従来から胎動感と呼ばれています
Introduction
0 - 4 Weeks
4 - 6 Weeks
6 - 8 Weeks
8 Weeks
8 - 12 Weeks
3 - 4 Months
4 - 6 Months
6 Months - Birth