Secondary infertility is the inability to conceive after one or more successful pregnancies.
The medical causes are similar to those of primary infertility, and include sperm problems, tubal factors, endometriosis and ovulation difficulties. Yet there are differences also. For one thing, is the age factor-the couple would be older, and it may take the wife longer to conceive. Emotional aspects have to be taken into consideration. However, just because they have achieved pregnancy once does not make them immune to all the illness which can cause infertility tubes can get blocked and sperm counts can drip as times go by.