Egg cell. This is a cell that becomes an embryo when a sperm cell fertilizes it, making the person pregnant. Ovaries produce egg cells, and they release one (sometimes more) during the ovulation period of the reproductive cycle. Fertilization happens inside one of the fallopian tubes, and the fertilized egg travels to the womb where it will eventually grow into a viable baby over the next 40 weeks. In biology, an egg cell is also called an ovum (plural ova).

ovum, ova