It's time to end this debate once and for all. The old canard, "Which came first, the chicken or the egg?" has long been answered by modern science.
Clearly, the egg.
If we take by egg to mean chicken egg, then we know well that evolution happens through random mutation. Thus while every chicken alive must have been born from a chicken egg, the first chicken egg was layed by the chicken's evolutionary ancestor.
Of course there are always difficulties with properly defining species, but I believe this logic holds.