Definition: Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
Input: Abstract: Solid-phase enzyme immunoassays, based on monoclonal antibodies reactive with different forms of human placental-type alkaline phosphatases, were applied to their detection in human seminal plasma from fertile and infertile men. The placental-like form of alkaline phosphatase (PLAP-like AP), known to occur in testicular tissue, was found in normal seminal plasma. The incidence of detection and levels of this isoenzyme correlated significantly with the designated fertility status of the donor. Seminal plasma (PLAP-like AP) may reflect germ cell function and/or access of testicular products to the ejaculate.
Which is the apt title for the abstract? option1: Placental-type alkaline phosphatase in human seminal plasma from fertile and infertile men. option2: Models for continuing professional education.
Output:
Placental-type alkaline phosphatase in human seminal plasma from fertile and infertile men.