Best Answer: This is botany so inside the ovary: the female megasporangium (ovule) produces the megaspore that matures into the female megagametophyte. Deep inside the ovule is the gametophyte archegonium that produces ova (eggs). The ovule is layered like a Russian doll set = integument (seed coat with micropyle opening for pollen tube access) over the megasporangium (nucellus) containing the megagametophyte (mature spore & embryo sac) that produces the ovum. The ovary is the organ that produces ova (singular, ovum), or eggs. An ovum (plural ova, from the Latin word ovum meaning egg or egg cell) is a haploid female reproductive cell or gamete. Ova are produced by female gonads (sexual glands) called ovaries . Archegonium is the place where female gametes are produced.