noun
cryopreserved oocyte; frozen ovum
Medical term for an egg cell that has been frozen for preservation, often in the context of fertility treatment.
See also: 凍結卵
凍結卵子を用いた体外受精が行われた。
In vitro fertilization using cryopreserved oocytes was performed.
彼女は将来の妊娠に備えて凍結卵子を保存している。
She is storing frozen ova for a future pregnancy.
凍結卵 is a broader term for any frozen egg, including avian or fish eggs, while 凍結卵子 specifically refers to human or mammalian oocytes in a medical context.
Compound of 凍結 (freezing) and 卵子 (ovum). The exact historical derivation is uncertain; the spelling is conventionally associated with the medical meaning.