Female fertility is considered to be on its peak in 20s. Most of the women are considered to be most fertile between the ages of 23 to 31, though the conception rate starts to go down in late 20s. When a woman hits her 30s, fertility starts to decline more rapidly at about 3 percent per year till the age of 35. After 35, this rate of decline further goes up and by the age of 40 it has fallen to half for most of the women.
