Answer:
Chlamydia
Step-by-step explanation:
It is said that Mary, now 31, has been unable to get pregnant since she got married 4 years ago. Her doctor suspects that the reason for her infertility problem was likely caused by her history of Pelvic Inflammatory disease caused by the most commonly reported Sexually Transmitted Infection.
The commonest STI related to infertility in young women is Chlamydia. This infection doesn’t present any symptoms most of the time which makes it very dangerous. Chlamydia increases the risk of ectopic pregnancy and also makes it impossible for pregnancy to occur later on.