“It’s been about 6 months since I started trying to conceive, but I haven’t seen any signs of pregnancy yet…” “I don’t think I’m infertility because I have regular period but…” “When should I go to the infertility clinic?” Sometimes we get some questions like above. In general, “infertility” is defined as not being able to get pregnant after 1 year of unprotected sex or 6 months for over 35 years old. However, the period of one year is just a guide, and it may be necessary to take early treatments depending on the age and the condition of the uterus, ovaries, fallopian tubes and sperms.