One of the possible ways to get pregnant fast is when the male partner has a virile and active high sperm count. One of the leading cause of male infertility is low sperm count- also referred to as Oligospermia.  The minimum sperm count is often expected to be 20 million per millimeter of semen and for pregnancy to occur, it is expected that 60% of these sperms must have the required normal shape and must also have the normal upward movement.
Low sperm count reasons
Fertility testing is one sure way of detecting whether your sperm count is low or high. After this, semen analysis test and [...]

Low sperm count can result from a number of biological, chemical, mechanical and environmental factors, some may even be genetic in nature, however the manner of approach also varies just as the causes vary. A healthy sperm is the one that often come as a white or grey colour such a sperm must be thick and come in substantial quantity.  It is generally believed that the ideal sperm should be 40 million while at least 75% of these must be alive and with 30% having the normal healthy shape. It is also believed that 20% of the total sperm must have the ideal speed required to make them fertile.
Natural Low sperm treatment