Final answer:
The prevalence of unintended pregnancies in the United States is significant, and while this can be influenced by the failure rate of contraceptives, the most up-to-date and accurate statistics should be sought from reliable health sources.
Step-by-step explanation:
Unintended pregnancies do account for a significant portion of all pregnancies in the United States each year, but rather than providing a binary true/false answer to an ever-changing statistic, it's better to refer to a reliable source for the most current information. Contraception methods vary widely in their effectiveness, expressed as a failure rate, which confirms the percentage of women who still get pregnant while using that method over a year. It's important to highlight that the failure rate with typical use is often much higher than the perfect use, due to inconsistencies in how individuals use contraception.
For instance, barrier methods, hormonal methods, intrauterine devices, and behavioral methods can all have different rates of failure. If no contraception is used, there's an 85 percent chance of pregnancy within one year. Contraceptive methods are generally reversible, except for sterilization. The discussion about whether contraception can be linked directly to pregnancy rates can be complex and also influenced by a variety of social, economic, and health factors.