You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "meiosis ii does not take place in the oocyte until?" whose answer is fertilization.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when does meiosis ii occur in oocytes
Useful Output:

Doc 1: Oocytes then enter into meiosis II (referred to as MII oocytes) but arrest at metaphase of meiosis II until fertilization. Only mature oocytes can be
Doc 2: Fertilisation trig- gers the resumption of meiosis-II, prompting the second meiotic chromosome segregation, formation of the second polar body,.
Doc 3: Then, the oocytes start meiosis II (MII) and are arrested at metaphase, awaiting fertilization. Meiosis is completed once oocytes are fertilized
Doc 4: At ovulation, the precursor exits the ovary and, only if fertilization occurs, is stimulated to complete meiosis II and form a complete egg.
Doc 5: In females, when is meiosis II completed? [A] After a secondary oocyte has been fertilized. [B] When the female embryo is developing.