At age 30 75% will have a conception ending in a live birth within one year 91% will have a conception ending in a live birth within four years At age 35 66% will have a conception ending in a live birth within one year 84% will have a conception ending in a live birth within four years At age 40 44% will have a conception ending in a live birth within one year 64% will have a conception ending in a live birth within four years[14]