| Time after spawning |
Remarks |
| min |
s |
| |
0 |
Spawning |
| |
45 |
Spermatozoa attach to egg surface |
| 1 |
40 |
Egg becomes spherical |
| 2 |
20 |
Entrance cone begins to appear |
| 3 |
05 |
Entrance cone reaches maximum size |
| 4 |
10 |
First polar body appears on egg surface |
| 4 |
20 |
Entrance cone disappears |
| 5 |
25 |
First polar body appears on egg surface |
| 7 |
00 |
Egg jelly surrounds egg surface |
| 11 |
20 |
Fertilization membrance begins to elvate |
| 12 |
40 |
Second polar body begins to appear |
| 14 |
30 |
Fertilization membrance reaches full size |
| 15 |
30 |
Second polar body attaches to fertilization membrance |
| 28 |
00 |
Egg jelly disappears |
| 30 |
15 |
First cleavage (2-cell stage) |
