Primary sterility is when a couple has never achieved pregnancy and secondary sterility when, after having already had a child, the couple does not achieve the second pregnancy.
The same applies to infertility. Primary infertility means that the first pregnancy is not successful, while secondary infertility means that, after the birth of a first child, the pregnancy of the second ends in abortion or any other abnormality that prevents the development until delivery.
Read the full article on: Sterility or Infertility: Are they the same or are there any differences? ( 71).
