Ovaries stop functioning altogether at menopause. At that point, age-related infertility is present and natural conception can no longer occur. Normal menopause occurs in woman from about 42 to 58 years old. However, the influence of age related infertility may start 10 years before menopause.
PU leather is JUNK and ultimately I would NEVER spend $350-$500 on a chair using PU Leather or Vinyl as a material. Even if it's the best PU leather known to man the fact is that PU leather is not as comfortable, durable or cleanable as a good protected leather.
The rubber sole is made by compression, the top of the black part is molds parting line. The Yellow part with specs is the same PU part holding the air bag but this area is masked off and painted. After the PU parts are cleaned and painted , they are bonded to the rubber parts by the stock fitting line.