|
Limbs
|
Timing
|
Source |
Upper limb buds appear.
|
Day 24 of development |
Larsen, p 209 |
| Lower limb buds appear. |
Day 28 of development. |
Larsen, p 209 |
| Upper limb buds are present. |
Day 26 after fertilization |
Moore, p 5 |
| Upper limb buds appear. |
Days 26-27 of development |
Sadler, p 110 |
| Lower limb buds appear. |
Days 28-30 of development |
Moore, p 91 |
| Hind limb buds appear. |
Days 28-30 of development |
Sadler, p 110 |
| Limb buds become visible. |
End of 4th week of development |
Sadler, 7th edition, p 154 |
| Forelimbs are paddle-shaped. |
Days 31-35 of development |
Sadler, p 110 |
| The limbs are forming. |
2nd month |
Sadler, p 106 |
| The forelimbs and hindlimbs appear
as paddle-shaped buds. |
Beginning of 5th week |
Sadler, p 106 |
| Limb development takes place. |
5th-8th weeks of development |
Larsen, p 209 |
| The upper limbs are longer and bent
at the elbows. |
Days 49-51 after fertilization |
Moore, p 91 |
| The upper limbs are slightly bent
at the elbows. |
Day 52 of development |
Larsen, p 209 |
| The limbs are long and bent at the
elbows and knees. |
Days 50-56 of development |
Sadler, p 110 |
| All regions of the arms and legs are
well-developed, including the toes. |
Day 56 of development |
Larsen, p 213 |
| All areas of the limbs are apparent.
In addition the digits have lengthened and are completely
separated. |
End of week 8 after fertilization |
Moore, p 97 |
| The upper limbs have almost reached
their final relative lengths and are a bit better
developed than the lower limbs. |
End of the 12th week after fertilization |
Moore, p 111 |
| The lower limbs are well-developed. |
14th week after fertilization |
Williams, p 155; Moore p 109 |
