The Lancet · 1976 · 16 citations · 7 references
MedicineGynecologyObstetricsContraceptionFertilityReproductive HealthAdolescent ContraceptionContraceptive DiscontinuationContraceptive FailureContraceptive MethodsContraceptive SafetyContraceptive UseOral Contraceptive Discontinuation
7
The Statistical Analysis of Time Series.
T. W. Anderson · Biometrics · 1995 · 2K citations
WHERE HAVE ALL THE CONCEPTIONS GONE?
Claire T. Roberts · The Lancet · 1975 · 263 citations