This could be that the patients ovaries are unable to produce eggs anymore or have a diminished ovarian reserve and produce few eggs...
Answer:
By eating things with protein in it. Sorry if this sounds too simple, but that's all it is.
These are sources of very good cavier. The beluga is actually a whale, while the osetra is a sturgeon. The sevruga is also a sturgeon.
It can also be called a column.