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 41
4 to 5 Months (16 to 20 Weeks): Stress Response, Vernix Caseosa, Circadian Rhythms
See Snapshots
See Snapshots
16 週までには 胎児の腹腔に 針を差し込む処置を 行うことにより ホルモンのストレス反応を誘発し ノルアドレナリンや ノルエピネフリンを 血中に放出するようになります
See Snapshots
呼吸器官では この頃に器官支樹の 形成が完了します
See Snapshots
胎脂と呼ばれる 白い保護物質が 胎児を覆います 胎脂は 羊水の刺激から 皮膚を保護します
See Snapshots
19 週以降の胎児の動きでは 呼吸活動が始まり 心拍は日周性の 概日リズムに支配されます
Chapter 42
5 to 6 Months (20 to 24 Weeks): Responds to Sound; Hair and Skin; Age of Viability
See Snapshots
20 週までには 聴覚器官である うずまき官が 大人の大きさに達します 内耳もその頃には 完全に発達しています この頃からは 胎児は 幅広い音に対して 反応するようになります
See Snapshots
頭皮には毛が生えはじめ
毛嚢や皮脂腺などの 皮膚の層や構造が 形成されています
See Snapshots
受精後 21 ~ 22 週までには 肺は 空気を取り込む能力を ある程度備えています これにより 子宮の外での生存が 胎児によっては可能となるので この時点を生育可能な 年齢とみなします
Introduction
0 - 4 Weeks
4 - 6 Weeks
6 - 8 Weeks
8 Weeks
8 - 12 Weeks
3 - 4 Months
4 - 6 Months
6 Months - Birth