Geographic variations in probability of pregnancy in four cities of France.
Rev Epidemiol Sante Publique
; 54(1): 55-60, 2006 Feb.
Article
en En
| MEDLINE
| ID: mdl-16609637
ABSTRACT
BACKGROUND:
Several studies have described geographic variations in human fecundability, but this phenomenon has almost exclusively been studied at an international level rather than within a given country. Our aim was to describe geographic variations in fecundability, the monthly probability of pregnancy, between four cities of France.METHODS:
We conducted a cross-sectional study in four French maternity units from Toulouse, Rennes, Lyons and Paris, among partners of pregnant women. Women were asked about the time to pregnancy (TTP) of their current pregnancy. TTP was analysed with a discrete Cox model allowing to estimate fecundability ratios (FR).RESULTS:
Time to pregnancy was defined for 894 couples. There was no strong evidence of heterogeneity in fecundability between the four compared cities (p=0.05 without adjustment and p=0.25 after adjustment for behavioural and medical factors). The highest fecundability was observed in Rennes and the lowest in Toulouse (fecundability ratio (FR)=1.28, 95% CI 1.01-1.63). Differences in fecundability were smaller between the other cities.CONCLUSION:
We highlighted a possibly slightly higher fecundability in Rennes compared to Toulouse. Possible explanations for this finding are discussed. We note that the finding is consistent with previous observations indicating a higher sperm concentration among semen donors in Rennes than in Toulouse.
Buscar en Google
Banco de datos:
MEDLINE
Asunto principal:
Fertilidad
Tipo de estudio:
Clinical_trials
/
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
/
Male
/
Pregnancy
País/Región como asunto:
Europa
Idioma:
En
Año:
2006
Tipo del documento:
Article