title: On the distribution of the menstruating interval.
abstract: This article is concerned with the development of some stochastic models better suited to describe the observed distributions of the menstruating interval relating to last closed-birth interval of two types of females. In this context, two models suited for couples using or not using contraception have been proposed. In the first case, the model assumes a constant conception rate (analogous to the constant hazard rate in the life-testing problem) over time whereas the second case assumes a time-dependent form of the conception rate. The models have been applied to the data collected in a survey conducted in Lucknow, and estimates of conception rate for the two types of females have also been obtained.
authors.affiliation: Department of Statistics, Banaras Hindu University, Varanasi, Uttar Pradesh, India. rcyadava66@yahoo.co.in
authors.forename: R C
authors.initials: RC
authors.lastname: Yadava
authors.forename: Richa
authors.initials: R
authors.lastname: Pandey
authors.forename: A K
authors.initials: AK
authors.lastname: Tiwari
mesh_terms: D000568:Amenorrhea / Q000209:etiology; D001721:Birth Intervals / Q000706:statistics & numerical data*; D003268:Contraception Behavior / Q000706:statistics & numerical data*; D003271:Contraceptive Agents, Female / Q000008:administration & dosage*; D003625:Data Collection; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects / Q000502:physiology*; D008954:Models, Biological; D015233:Models, Statistical; D049590:Postpartum Period / Q000502:physiology; D011247:Pregnancy; D013997:Time Factors
chemical_list: D003271:Contraceptive Agents, Female