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.
Polyurethane foam, also known as Urethane Foam, Foam Rubber, PU, PUF and PUR, is a flexible, open-cell type of foam that has a near-infinite amount of applications due to the following characteristics: 1  Compressibility.2  Cushioning.3  Energy absorption.4  Fabricatibility.olyurethane foam, also known as Urethane Foam, Foam Rubber, PU, PUF and PUR, is a flexible, open-cell type of foam that has a near-infinite amount of applications due to the following characteristics: 1  Compressibility. 2  Cushioning. 3  Energy absorption. 4  Fabricatibility.