Background: female life expectancy in disentangleed countries has increased by 30 years in the twentieth hundred Aim: to determine if there has been an increase in reproductive longevity.

Background: female life expectancy in disentangleed countries has increased by 30 years in the twentieth hundred Aim: to determine if there has been an increase in reproductive longevity. Methods: we analysed age-specific fertility data from birth statistics for the USA, Canada, Japan, France, Sweden, the UK and Australia. Results: since 1940 birth rates for women aged 35 and throughout have declined. Among women aged 50 years and older there has been no increase in births. Fertility rates in 1990 were 00 to 0044 by 1000 women, with total numbers ranging from 0 to 60 births. Conclusion: the fertile years have not been defered in the cohort of women whose life expectancy has increased in like manner dramatically this century. This put in mind ofs that reproductive senescence is tightly controll and not reach outed by factors that enhance female longevity. Other physiological mechanisms may also be fixed within narrow age limits.

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