<prompt> Which of the following STDs cause fetal abnormality-HerpesHepatitisGonococciSyphilis  <response>: Ans. is d i.e., Syphilis Congenital syphilis o Transmission of T pallidum across the placenta may occur at any stage of pregnancy, but the lesions of congenital syphilis generally have their onset after the fouh month of gestation. o Early maternal syphilis has more chances of transmission 75-90 than late maternal syphilis. o Adequate treatment of mother before 16th week of pregnancy prevents fetal damage. o Effects of maternal syphilis on pregnancy are : Still bih aboion Neonatal death Prematurity Non fatal congenital syphilis. 