In 1790, the year of the first census in the USA, the birthrate was 55 per 1000 people, with an average of 8 births per woman.
In 1990, the birthrate in the USA was 15.5 per 1000 people. with an average of 1.8 births per woman. (Of course, many factors are involved in this decline.)
Fecundability is the probability of acheiving a pregnancy within 1 menstrual cycle and is approximately 25% in the average couple.
| TIME REQUIRED FOR CONCEPTION | ||
| HOW LONG HAVE YOU TRIED? 1 month 3 months 6 months 1 year 2 years |
CHANCE OF BEING PREGNANT 25% 57% 72% 85% 93% |
|
Infertility affects 10-15% of all couples.
- Question on infertility
- Question on basal body temperature taking when trying
to get pregnant.
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