Dear Anonymous,
To negate the contraceptive effect of the condom, you simply perforate the tip of the condom with a sterile needle prior to using it. This accomplishes exactly what you are seeking—-obtaining a sample for analysis from the seminal fluid retained in the medical condom, while maintaining the integrity of the marital act, since the perforation in the comdom permits seminal fluid to also be deposited in the vagina through a normal marital act. Not only is this a morally and aesthetically more suitable means for collecting seminal fluid for analysis than the commonly employed method of asking the man to provide a specimen during his visit to the lab, there are also some studies which indicate this may be a more accurate analysis, reflecting normal conditions.
For an accurate sample, you also should use a condom that has not been treated with spermicides, sometimes referred to as medical condoms. Because many have told us they have encountered difficulty obtaining medical condoms from doctors or labs who may not be sensitive to this request, we do offer a medical condom, the “Male Factor Pak”, for sale at our cost. To obtain, simply send $10 payable to CANFP and one will be mailed immediately to the address you provide.
Sheila St. John