Regarding contraception, here are some general statistics
Fifty-four percent of women who have abortions had used a contraceptive method (usually the condom or the pill) during the month they became pregnant. Among those women, 76% of pill users and 49% of condom users report having used their method inconsistently, while 13% of pill users and 14% of condom users report correct use.8]
All contraception has failiure rates.
An honest look at the data shows that in virtually every country that increased the use of contraception, there was a simultaneous increase in that country’s abortion rate. In England (Rise in contraceptive use: simultaneous rise in abortions), France (Rise in contraceptive use: simultaneous rise in abortions), Australia, (Rise in contraceptive use: simultaneous rise in abortions), Portugal (Whose abortion rate only began to rise after 1999, after oral contraceptive methods were made widely available), Canada (Whose abortion rate only began to rise after the legalization of oral contraceptives in 1969), and, as the Guttmacher Institute shows, Singapore, Cuba, Denmark, the Netherlands, and South Korea, to name a few.
And of course, we saw this rise in the land of the free and home of the brave. Contraceptive devices gained popularity throughout the 1900′s, and were “legalized” in 1965. The widespread proliferation of contraceptive devices followed. The abortion rate began to creep up at this same time, after 1965, from 0.02 abortions per 1,000 women ages 15-44 in 1965 to 16.33 in 1973, when abortion was legalized.
Now before the inevitable screams of “correlation does not equal causation!” commence, let’s dive a little deeper. It is true that correlation is not causation, but what many of the Internet-trained forget — myself included — is the obvious truth that correlation does not rule out causation. In fact, if there is strong correlation and a logical reason for causation, correlation does imply some degree of causation, though there may be many other factors involved. So is there a logical reason for the increased use of contraceptives to be correlated with the increased abortion rate between 1965 and 1973?
Yes. As Guttmacher researcher Stanley Henshaw noted in his review “Unintended Pregnancy in the United States“, “contraceptive users appear to have been more motivated to prevent births than were nonusers”. The CDC has consistently reported that the majority of abortions are performed on women who were using contraception at the time of their last menstrual cycle, that is, at the time they conceived. If contraceptive users are more motivated to have abortions than non-contraceptive users, then it is not ridiculous to posit that the increased use of contraception in the USA was a major factor in the simultaneous increase in abortions.