title: Socio-economic development and transition in the duration of post-partum amenorrhoea:  survival function analysis of data.
abstract: The impact of improved maternal socioeconomic status in the form of nutritious food on length of postpartum amenorrhea (PPA) is assessed using data for Varanasi city, India, for the period 1987-1990.  "Estimates of survival functions corresponding to data relating to mothers of different social status groups, assumed to represent health condition of mothers, are obtained and compared.  Finally, it is concluded that the distribution of duration of PPA is a mixture of two distributions and it differs from one social status group to [the] other."
authors.forename: S N
authors.initials: SN
authors.lastname: Singh
authors.forename: K K
authors.initials: KK
authors.lastname: Singh
authors.forename: K
authors.initials: K
authors.lastname: Singh
authors.forename: S
authors.initials: S
authors.lastname: Singh
mesh_terms: D000568:Amenorrhea; D001208:Asia; D003247:Conservation of Natural Resources; D003906:Developing Countries; D004467:Economics; D004777:Environment; D005523:Food Supply; D006262:Health; D007194:India; D008429:Maternal Welfare; D009747:Nutritional Physiological Phenomena; D049590:Postpartum Period; D012098:Reproduction; D012106:Research; D012923:Social Class; D012959:Socioeconomic Factors
keywords: Asia; Comparative Studies; Developing Countries; Economic Factors; Environment; Food Supply; Health; India; Maternal Health; Natural Resources; Nutrition; Postpartum Amenorrhea--determinants; Puerperium; Reproduction; Research Methodology; Socioeconomic Factors; Socioeconomic Status; Southern Asia; Studies