An appropriate endpoint--cumulative live birth rate (CLBR).
Check
Jerome H
JH
D001723:Birth Rate; D005260:Female; D006801:Humans; D007248:Infertility, Male / Q000209:etiology*; D008297:Male; D011247:Pregnancy; D018873:Pregnancy Rate; D013094:Spermatozoa / Q000002:abnormalities*