Template:Human Fertilization Movie 1 frame table
From Embryology
| Approximate Timing of Early Events | ||||
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| components | spermatozoa penetrates zone pellucida | spermatozoa penetrates oocyte - fertilization | second polar body | pronuclei |
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| pronuclei fusion | first mitosis | two blastomeres | second mitosis | four blastomeres |
| See clock in lower righthand corner for approximate timing of events. | ||||
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