Meiosis and oocytes Watch
I thought the egg disintegrates after 24 hours if it is not fertilised and then followed by the break down of the endometrium lining the uterus in the next couple of days.
So not sure what I have quoted above is highlighting.
Here is the attachment below:
I think it is referring to eggs that have not matured yet, before ovulation. As all eggs are formed in utero, by the age 40 a single egg may be 40 years old, during this time its chromosomes are attached to spindles.
However, some eggs are released after months or weeks from the ovary so the chromosomes in these eggs are not attached to the spindle fibres for a long time.
So I guess it really depends on chance..it is random as to which egg is released from the ovary and how long the chromosomes have been attached to the spindle fibres in this egg.