The kidney is not one large filter. Each kidney is made up of about a million filtering units called nephrons. Each nephron filters a small amount of blood. The nephron includes a filter, called the glomerulus, and a tubule. The nephrons work through a two-step process.
Generally speaking, first babies tend to engage from about 34 weeks to 36 weeks. However, some babies only engage once labour starts. Try not to worry, though. Even if your baby hasn't engaged by the time labour starts, in most cases, it's not a problem.
The time factor in planning a wedding depends on how large and fancy a wedding your planning. With enough money you can a have formal wedding in 2 days, but generally us normal people need about 6 months. Engagement should be anywhere from 6 months to a year long before the wedding. Lady Susan Â· 6 years ago.