title: A study to review sex ratio at birth and analyze preferences for the sex of the unborn.
abstract: OBJECTIVE
  (1) To study the status of sex ratio at birth with increasing birth order, (2) To ascertain the relationship of declining sex ratio with respect to socio demographic factors. (3) To study outlook of patient towards sex preference, willingness to determine sex of the fetus, wish to terminate the pregnancy in case of unwanted sex of the baby.
  
  
  METHODS
  This is the retrospective study done in the Department of Obstetrics and Gynaecology, Nowrosjee Wadia Maternity Hospital, Parel, Mumbai. The data was collected from the records maintained in Medical Record Department from January 2007 to December 2012 and were studied to determine the sex ratio as well as its relationship with the increasing parity. 95 % confidence interval for the sex ratios was calculated.
  
  
  RESULTS
  Average sex ratio of 6 years was 908 females per 1,000 males. Sex ratio was 972 females per 1,000 males in primi para, which decreased to 879 females per 1,000 males in second para, further reduced to 784 females per 1,000 males in third para and 864 females per 1,000 males in fourth para.
  
  
  CONCLUSIONS
  The 'sex ratio at birth', defined as the number of girls born for every 1,000 boys born, is a more accurate and refined indicator of the extent of prenatal sex selection.
authors.affiliation: Department of Obstetrics and Gynecology, Nowrosjee Wadia Maternity Hospital and G. S. Medical College, Parel, Mumbai, 400 012 India.
authors.forename: Yugali
authors.initials: Y
authors.lastname: Warade
authors.affiliation: Department of Obstetrics and Gynecology, Nowrosjee Wadia Maternity Hospital and G. S. Medical College, Parel, Mumbai, 400 012 India.
authors.forename: Geetha
authors.initials: G
authors.lastname: Balsarkar
authors.affiliation: Department of Obstetrics and Gynecology, Nowrosjee Wadia Maternity Hospital and G. S. Medical College, Parel, Mumbai, 400 012 India.
authors.forename: Pooja
authors.initials: P
authors.lastname: Bandekar
keywords: PC-PNDT; Prenatal sex selection; Sex ratio