Disorder of Pregnancy
Placenta Previa : Preponderance of Male Sex at Birth
Demissie K, Brakenridge MB, Joseph L, et al ( Univ of Medicine and Dentisty of New Jersy-Robert Wood Johnson Med School, New Brunswick, McGill Univ, Montreal )
Am J Epidemiol 149; 824-830, 1999
This is a meta- analysis of seven published reports on this topic. It revealed a 14% excess of placenta previa when women were carrying a viable male fetus versus a viable female fetus during pregnancy.
It concludes that women carrying male fetuses have a higher risk of placenta previa.
Elective Caesarean – Section Verses Vaginal Delivery in Prevention of vertical HIV – 1 Transmission : A randomised Clinical Trial
Parazzini F, for the European Mode of Delivery Collaboration ( Istituto Mario Negri, Milano, Italy )
Lancet 353; 1035 – 1039, 1999
Infection was documented in 1.8% of the infants in the caesarean group and 10.5% in the vaginal delivery group in this randomised clinical study of 436 women who had a confirmed diagnosis of HIV-1
The authors conclude that elective caesarean section Significantly reduces the risk of mother – to - child transmission of HIV infection and does not increase the risk of maternal complications