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These multiple follicles can be taken out by oocyte retrieval (egg collection) for use in in vitro fertilisation (IVF), or be given time to ovulate, resulting in superovulation which is the ovulation of a larger-than-normal number of eggs, [2] generally in the sense of at least two.
Primordial follicle initiation and development varies by species; in the canine primordial follicle formation occurs 17–54 days post birth. At 17 days, primordial follicles, each of consists of a small oocyte (with no zona pellucida) and a single layer of flattened pre-granulosa cells, can first be observed in the cortical layer of the ovary.
Transvaginal oocyte retrieval is more properly referred to as transvaginal ovum retrieval when the oocytes have matured into ova, as is normally the case in IVF. It can be also performed for egg donation , oocyte cryopreservation and other assisted reproduction technology such as ICSI .
As of 2013, an estimated 75% of 700 million dogs worldwide were free to roam and reproduce, resulting in overpopulation, high mortality rates and poor health. [1] The main management approach is surgical sterilization, i.e. the removal of testes or ovaries, often performed through trap-neuter-return strategies. [2]
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Controlled ovarian hyperstimulation, which is generally part of in vitro fertilization, and the aim is generally to develop multiple follicles (optimally between 11 and 14 antral follicles measuring 2–8 mm in diameter), [medical citation needed] followed by transvaginal oocyte retrieval, co-incubation, followed by embryo transfer of a maximum ...
OHSS is a potential side effect of stimulating the ovaries to produce multiple eggs at the same time either during the first part of an IVF cycle or when planning to freeze eggs, reproductive ...
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