There are various rootcause of infertility
Infertility are caused by male and female. For pregnancy, both men and women have various processes, but it is the cause of infertility that an abnormality happens somewhere in those processes.
Mainly, 30% of the cause is from women, 30% is from men and the rest is unexplained and both.
Let’s look at the process till pregnancy.
Looking at the process leading up to the establishment of pregnancy, in men, sperm produced in the testes are moved and stored in the vas deferens and then ejaculated from the urethra. On the other hand, in women, after mature eggs are ovulated in the ovaries, they are then received into the fallopian tubes, fertilized, moved to the uterus, and implanted. Infertility tests look for abnormalities in these processes, but 10 to 20% of “unexplained infertility” (functional infertility) cannot be identified by the test. Since infertility increases as the couple ages, aging (ie: aging of eggs and sperms) is considered to be a major cause.
How sperm and eggs meet