Essential Fertility: By the Numbers

By the Numbers
1 to 2 million: The number of eggs in the ovaries of newborn girls.
300,000 to 400,000: Number of eggs in teenage girls.
25,000: Typical number of eggs remaining at age 37* (*though the count can vary widely from woman to woman)

By the Numbers
21.4: Average age of first-time mothers in the United States in 1970.
25.2: Average age of first-time U.S. moms today.
27.7: Average age of first-time mothers in Canada.
29.4: Average age of first-time mothers in France.
30.4: Average age of first-time moms in Italy. 

By the Numbers 
1954: First successful birth from frozen sperm.
1984: First baby born from a frozen embryo.
1996: First successful birth using frozen eggs.
2000: Birth of first babies—twins—conceived from both frozen eggs and frozen sperm.
2005: First baby born using a frozen donor egg from a commercial egg bank. 

By the Numbers
20 to 25: Percent chance of conceiving in a given month for women in their early twenties.
15 to 20: Percent chance in late twenties and early thirties.
10: Percent chance in early thirties.
8: Percent chance from middle to late thirties. 

By the Numbers
200 million: Approximate number of sperm deposited into the vagina near the cervix in a typical ejaculation.
100,000: Number of sperm that make it into the uterus -- less than 0.1 percent. 
400: The number of sperm that reach the immediate vicinity of the egg. 

By the Numbers
2.6: Average number of children per Utah woman, the highest U.S. average.
1.7: Average births per female residents of Maine, Massachusetts, and Vermont.
7.5: Average number of children per women in Niger, Africa, home of the world’s highest fertility rate.
1.3: Birth rates in Spain and Italy.