Chromosomes contain the genetic information that makes us. Our cells normally contain 23 pairs of chromosomes – 46 in total – which are divided so that the eggs and sperm contain 23 single chromosomes each.

If a semen analysis results show that you have no sperm seen in the ejaculate, or if very few are present, or if there is a history of recurrent miscarriages, we may suggest a karyotype test on a blood sample looking at the number of chromosomes contained in the body. This is done to hopefully rule out any chromosomal defects which account for the above.