Fir pollen

Pollen (from the Greek blade: flour or dust) is, in higher plants, the male fertilizing element of the flower: they are tiny grains of more or less ovoid few tens of micrometers in diameter, initially contained in the anther at the ends of stamens.
The pollen grain is not a gamete gametophyte but a full, ie, a producer of gamete. We can not draw any analogy between the pollen grain and egg because the egg is not a gametophyte itself, but a macrosporangia which contains a gametophyte.