Mean age of American women undergoing fertility treatments: 35 years
Mean age for first-time U.S. mothers in 2003: 25.2 years
Probability of a woman getting pregnant after one year of trying at age 20: 90%
At age 30: 70%
At age 35: 55%
At age 40: 45%
At age 45: 6%
Age at which sperm production begins to slowly decrease: 25 years
Age at which sperm production begins to rapidly decrease: 40 years
Proportion of fertility cases caused by female factors: 40%
Proportion of fertility cases caused by male factors: 40%
Proportion of fertility cases caused by a combination of both: 20%
Number of live births (counting each delivery, not each baby) from infertility treatments in 1996: 14,507
Number of live births from infertility treatment in 2003: 48,756
Number of infertility treatment cycles reported in 2003: 112,872
Proportion of those cycles that used the woman's own eggs or embryos, fresh: 74%
Proportion of those cycles that used woman's own eggs or embryos, frozen: 14%
Proportion of those cycles that used donor eggs or embryos: 12%
Out of 25,775 live births from infertility treatments in 2003:
The proportion of singletons: 65.8%
The proportion of twins: 31%
The proportion of triplets of more: 3.2%
Research by Sarah Sundberg. Cribsheet appears in Strollerderby every Wednesday.
