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Seventh Week
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|
Source |
| The eyes are developing rapidly. |
7th week after conception |
Rugh, p 52 |
The ears are developing rapidly.
|
7th week after conception |
Rugh, p 52 |
| Thumbs and fingers with pads are present. |
7th week after conception |
Rugh, p 44 |
| All the fingers are present. |
7th week after conception |
Rugh, p 52 |
| The jaws, ribs, and vertebrae are
changing from cartilage to bone. |
7th week after conception |
Rugh, p 52 |
| The fetal heart is functionally complete
and normal. |
7th week after conception |
Rugh, p 53 |
| The heels are developing. |
7th week after conception |
Rugh, p 44 |
| Bronchi begin to form in the right
and left lung. |
7th week after fertilization |
Moore, p 262 |
| The first indication of limb musculature
is observed. |
7th week of development |
Sadler, 7th ed., p 168 |
| A distinct neck connects the head
with the body. |
7th week after conception |
Rugh, p 51 |
| The nasal chamber is developing. |
7th week |
Sadler, p 376 |
| The primary palate is developing. |
7th week |
Sadler, p 376 |
| The anorectal canal is developing. |
7th week |
Sadler, p 316 |
| The gonads acquire male or female
characteristics. |
7th week of development |
Sadler, p 319 |
| Neck and trunk muscles start contracting
spontaneously. |
7th week after fertilization |
England, p 206 |
| Startles first occur. |
7th week after conception |
Roodenburg, p 33 |
| Startles were observed in 12 of 12
fetuses studied, with a median number of about 42
per hour. |
7th week after conception. |
de Vries (1985), p 104 |
| Isolated arm movements first occur. |
About 7 1/4 to 8 1/2 weeks after conception |
de Vries (1982), p 311 |
| Isolated leg movements first occur. |
About 7 1/4 - 10 1/2 weeks after conception |
de Vries (1982), p 311 |
| Backwards head movements first occur. |
7 1/2 - 10 1/2 weeks after conception |
Nijhuis/de Vries, p 5 |
| Head rotations first occur. |
7 1/2 - 10/12 weeks after conception |
Nijhuis/de Vries, p 5 |
| Ossification of the bones of the upper
limbs has begun. |
End of the 7th week after fertilization |
Moore, p 96 |
| The toes are well-formed. |
7th-8th weeks |
Sadler, p 108 |
| The fingers are developing. |
Day 43 after fertilization |
Sadler, front pages |
| Toe rays are developing. |
Day 43 after fertilization |
Sadler, front pages |
| The eyelids are formed. |
Days 43-49 of development |
Sadler, p 110 |
| Pigmentation of the retina can be
seen. |
Days 43-49 of development |
Sadler, p 110 |
| Digital foot rays are separating. |
Days 43-49 |
Sadler, p 110 |
| Digital rays are spearating |
Days 43-49 of development |
Sadler, p 110 |
| The upper lid is forming. |
Days 43-49 of development |
Sadler, p 110 |
| The elbows appear. |
Day 44 after fertilization |
Larsen, p xii |
| The palate is forming. |
Day 44 after conception |
Rugh, p 50 |
| Nipples are formed. |
Days 43-49 of development |
Sadler, p 110 |
| The eyelids form in the face. |
Day 44 after fertilization. |
Larsen, p xii |
| The nerve cells of the retina form. |
Day 44 after conception |
Rugh, p 50 |
| The first hair follicles appear. |
Day 44 after fertilization |
Larsen, p xii |
| Nipples appear. |
Day 44 after fertilization |
Larsen, p xii |
| Toe rays appear. |
Day 44 after fertilization |
Larsen, p xii |
| The elbow region is visible. |
Days 44-46 after fertilization |
Moore, p 91 |
| Digital rays can be seen clearly in
the foot plates. |
Days 44-46 after fertilization |
Moore, p 91 |
| Notches are present between the digital
rays in the hand. |
Days 44-46 after fertilization |
Moore, p 91 |
| Nipples are visible. |
Days 44-46 after fertilization |
Moore, p 91 |
| The nasal passages open to the outside. |
Day 46 after conception |
Rugh, p 51 |
| Microscopic examination can identify
the embryo's sex because the ovaries and testes
have differentiated. |
Day 46 after conception |
Rugh, p 51 |
| The bridge of the nose is visible. |
Days 47-48 after fertilization |
England, p 78 |
| The cheek is visible. |
Days 47-48 after fertilization |
England, p 83 |
| The knees are developing. |
Days 47-48 after fertilization |
England, p 180 |
| The nerve connections from the retina
to the brain are established. |
Day 48 after conception |
Rugh, p 51 |
| The face becomes fuller and starts
to look human. |
Day 48 after conception |
Rugh, p 51 |
| The stomach is a scale model of what
it will be at the time of birth. |
Day 48 after conception |
Rugh, p 52 |
| The toes are developing. |
Day 48 after fertilization |
Sadler, front pages |
| The tongue forms from the floor of
the mouth. |
Day 48 after conception |
Rugh, p 51 |
| The liver is developing. |
About 48 days after fertilization |
Moore, p 99 |
| The wrist is developing. |
About day 48 after fertilization |
Moore, p 99 |
| Notches appear between the digital
rays in the feet. |
Days 49-51 after fertilization |
Moore, p 91 |
| The upper limbs are longer and bent
at the elbows. |
Days 49-51 after fertilization |
Moore, p 91 |
| The rudiment of the face is created. |
Days 49-63 |
Larsen, p 230 |
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