This study will evaluate whether routine screening and treatment for two common sexually transmitted infections, chlamydia and gonorrhoea, during pregnancy can reduce preterm birth and other poor birth outcomes in Botswana, and whether this approach is affordable and cost-effective for the health system. About 2,000 pregnant women attending their first antenatal care visit at up to 10 government clinics in Botswana will be invited to join the study. All women will first receive the usual antenatal care services provided in Botswana, including routine health checks and HIV and syphilis testing. Women who enroll in the study will be randomly assigned to one of two groups: 1. Standard of care group: Women receive routine antenatal care only. 2. Intervention group: In addition to routine antenatal care, women are screened for chlamydia and gonorrhoea using self-collected vaginal swabs at their first antenatal care visit and again in the third trimester. The main outcome of the study is whether screening and treating chlamydia and gonorrhoeae reduces preterm birth (before 37 weeks). Other outcomes include low birth weight, very preterm birth, and maternal health conditions.
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Preterm birth
Timeframe: Weeks gestation at birth, calculated from delivery date and date of last menstrual period and first trimester ultrasound dating