If an erection is good in one situation but not in another, then the problem is with the situation and not with the penis. Anxiety on the ovulation day is VERY COMMON among men whose wives are undergoing ARTs. Counseling and anxiety-reducing drugs usually do not help. However special machines are available to obtain semen samples in such situations. Testicular and epididymal sperm aspirations (TESA, TESE, MESA) are almost never required.