HOW TO COLLECT SEMEN ABSTENSION [REFARDS SEXUAL ENCOUNTER/2-4 DAYS]/ FEWER OR GREATER ABSTENSION LEADS TO WRONG CONCLUSIONS/ GOOD WASHING GENITAL ORGANS/ PREVENTION AT HOME MASTURBATIUON/ GOOD ERECTION [EFFECTIVE INTEFRATED EJACULATION]/ USE STERILE URINAL/ SHOULD TAKE ALL MATERIAL EJACULATION/ DELICERY IN LABORATORY/ MAXIMUM OF HALF AN HOUR/ NO EXPOSURE TO THE SUN/ NOT CPPLERS