The secondary oocyte promptly matures into an ootid and then becomes a mature ovum.
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When meiosis II has completed, an ootid and another polar body have now been created.
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The succeeding phase of ootidogenesis occurs when the primary oocyte develops into an ootid.
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Thus, the time spent as an ootid is measured in minutes.
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It can be an oogonium, an oocyte or an ootid.
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Secondary oocytes are the immature ovum shortly after ovulation, to fertilization, where it turns into an ootid.
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In other words, the ootid is the immature ovum from shortly after fertilization, but before complete maturation into an ovum.
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More examples
Mature ovum after penetration by sperm but before the formation of a zygote
An immature ovum is a cell that goes through the process of oogenesis to become an ovum. It can be either an oogonium, oocyte and an ootid. An oocyte, in turn, can be either primary or secondary, depending on how far it has come in its process of meiosis.
The haploid cell, produced by meiotic division of a secondary oocyte, that is a nearly mature ovum
Alternative spelling of ootid
(ovum) Produced when a haploid secondary ooctye undergoes meiosis.