Its clear,that in sex contact with both partners is a infecting for sexualy transferring infecting as doubles, with three are triple and etc.s

 As for young peoples confessing for sexual freedom , infecting is possible, and also getting results. By American institute for national health,  a woman  had 7 sexual partners is staying sterility, but young peoples are not fear it, his bitter mind lead to this later. 

Am managing region for sterility and my young patients enjoying staying a mum , but infection diseases for inside organs and causing inflammation changes are hard healing in women's  and males.

Let s look a way for chlamydias. When they are cellular parasites staying in male organism, thus  in sex contacts sperm adding  theirs on own heads of penis in vagina of women, where   are faster moving in canal of neck uterine, and in first menses in cavity her, as here on destroyed mucus membranes chlamydias faster bringing and in big quantities  bringing far in uterine tubes, peritoneum cavity, ovaries.

Where is inflammation nidus stayed, he is injuring tissues, destroy epithelial tissues, causing theirs sclerotising, if inflammation staying in tubes, they  are partially or full staying no passing, thus meaning sterility. When ovaries damages, they are covering, like case   inflammatory capsule, destroying her blood supply, thus egg ripening   or staying hard , if egg ripe  s, thus she is staying a not full-fledged. But nature filled for women an awesome immunity system,  that selecting a full -fledges sperm. Infection breaking these control posts  and in result with a weak egg is meeting such a not full-fledges sperm. And doe a need to say ,that merge of both defective sex cells is not ability to put a new healthy fetus.