Columbia subject headings:
Generative organs, Male--Effect of drugs on--Congresses.
Oral contraceptives, Male--Congresses.
Harvard subject headings:
Generative organs, Male--Effect of drugs on--Congresses.
Infertility, Male--Congresses.
Male contraception--Congresses.
Oral contraceptives, Male--Congresses.
Vasectomy--Congresses.
Princeton subject headings:
Generative organs, Male--Effect of drugs on--Congresses.
Infertility, Male--Congresses.
Oral contraceptices, Male--Congresses.
Vasectomy--Congresses.