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.
It identifies a womanâs potentially fertile days as day 8-19 of her cycle. These 12 days are based on when is ovulation likely to occur, and how many days before and after ovulation, a woman can get pregnant. Click here to find out more about this family planning method and how to plan or prevent pregnancy using it.