(a) Time of sample collection
(b) Applied detection method
Figure 5: HPV prevalence depends on time of sample collection and on the applied HPV detection method. (a) Cervical HPV prevalence in % at different time points of sample collection of normal pregnancies. 25 studies have been included in the present analysis, , , , , and . (b) HPV prevalence in % in relation to the detection method used. Note that only two studies were using Southern blot as their main detection method. 45 studies have been included in the present analysis, , , , and . indicated number of studies included. indicates number of cases included. , , , and ; ns: not significant.