Doxycycline treatment and human infertility.

Area of Science:

• Reproductive Medicine
• Microbiology
• Infectious Diseases

Background:

• Mycoplasmas, including T mycoplasmas and Mycoplasma hominis, are bacteria that can colonize the urogenital tract.
• The potential role of mycoplasmas as a cause of infertility, particularly primary infertility of unascertained cause, has been a subject of investigation.

Purpose of the Study:

• To investigate the association between mycoplasma colonization and infertility in couples.
• To evaluate the efficacy of doxycycline treatment in eradicating mycoplasmas and improving conception rates in couples with primary infertility.

Main Methods:

• A study involving 120 couples to assess mycoplasma prevalence in those who conceived versus those who did not.
• A randomized controlled trial of 88 couples with primary infertility, comparing doxycycline treatment, placebo, and no treatment.

Main Results:

• Mycoplasma isolation rates were slightly higher in couples who conceived compared to those who did not, but the difference was not statistically significant.
• Doxycycline successfully eradicated Mycoplasma hominis and T-strain mycoplasmas in 96% of treated couples.
• Conception rates were similar across the doxycycline, placebo, and untreated groups.

Conclusions:

• Mycoplasmas are not significantly associated with primary infertility of unascertained cause.
• Doxycycline treatment, while effective in eradicating mycoplasmas, does not improve fertility outcomes in this patient population.