Zn 0-12 h Whatman Grade 3	Zn 12-36 h Whatman Grade 3	AP 0-12 h Whatman Grade 1	AP 0-12 h Whatman Grade 3	AP 0-12 h VWR Grade 417

 

Fig. 7.   Additional tests of women's underwear (5 separate pairs) at intervals after intercourse with zinc and AP tests

 

 

 

 

0-12 h PSA	12-24 h PSA	24-36 h PSA	36-60 h PSA

 

0-12 h PSA	0-12 h Semenogelin	12-36 h PSA	12-36 h Semenogelin

 

0-8 h PSA	0-8 h Semenogelin	8-20 h PSA	8-20 h Semenogelin	20-32 h PSA	20-32 h Semenogelin	32-47 h PSA	32-47 h Semenogelin

 

Figure 8.  Extraction of cotton underwear at intervals after sexual intercourse and testing for PSA and semenogelin.  Three separate trials are shown.

 

 

Extraction of Absorptive Pads

In order to determine whether a woman's menstrual period affects the ability to detect PSA, the absorptive pads of a volunteer on her menstrual period were analyzed at various intervals after intercourse.  The pads were analyzed using PSA strips.  The results are shown in Fig. 9-10.  PSA was detectable up to 36 h after intercourse, which was approximately the same result obtained by analyzing undergarments while not on a menstrual period.  These results indicate that a woman's menstrual period does not interfere with the ability to detect PSA by immunochromatographic strips.

 

 

 

0-12 h	12-24 h	24-36 h	36-48 h

 

0-8 h	8-19 h	19-24 h	24-32 h	32-43 h	43-56 h

 

Figure 9.  Extraction of menstrual absorptive pads at intervals after sexual intercourse.  Two separate trials are shown.