Q: Immunological basis of infertility A: I'll start by reading the medical library skill, then search for comprehensive content on immunological basis of infertility. A: Now let me search the library and PubMed in parallel for comprehensive coverage. A: Good. Now let me read the key sections from the textbooks in parallel. A: Let me now search for more specific content on blood-testis barrier, female immunological infertility, and NK cells. A: Now let me read the key passages on uterine NK cells and the blood-testis barrier in detail. A: You've run out of free credits. Sign up for a free account to continue using Orris.