During 2006-2010,among females aged 15-44 years, the percentage of those who ever used infertility services increased through age 34 years, and leveling off for women aged 35-44 years. Approximately one fifth of women aged 35-39 years and 40-44 years had ever used infertility services,either to become pregnant or to prevent a miscarriage, compared with 2.3% among females aged 15-24 years. employ of medical help to become pregnant ranged from 1.2% for females aged 15-24 years to 16.4% for women aged 35-39 years. employ of medical help to prevent miscarriage showed a similar but less steep increase with age.
Source: cdc.gov