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A study of a population of French women from 1670 and 1789 shows that those who married at age 20–24 had 7.0 children on average and 3.7% remained childless. Women who married at age 25–29 years had a mean of 5.7 children and 5.0% remained childless. Women who married at 30–34 years had a mean of 4.0 children and 8.2% remained childless. [20]
Replacement fertility is the total fertility rate at which women give birth to enough babies to sustain population levels, assuming that mortality rates remain constant and net migration is zero. [10] If replacement level fertility is sustained over a sufficiently long period, each generation will exactly replace itself. [10]
Other hormonal changes in chemotherapy include decrease in inhibin B and anti-Müllerian hormone levels. [21] Women may choose between several methods of fertility preservation prior to chemotherapy, including cryopreservation of ovarian tissue, oocytes or embryos. [22]
Countries with lower levels of development and gender equivalence are likely to find that a higher level of women's education, greater than secondary level, is required to affect fertility. Studies suggest that in many sub-Saharan African countries fertility decline is linked to female education.
While the government agency didn't share numbers beyond age 44, the data show that fertility rates rapidly increased in women in the 40 to 44 age group. In 1990, the fertility rate in this group ...
Most men and women benefit from exercising and losing excess weight before trying to conceive – this is known to boost fertility. Regular physical activity reduces stress, improves sleep and ...