In 2006, nearly half (49%) of pregnancies in the United States were unintended, up slightly from 48% in 2001. The unintended pregnancy rate was 52 per 1,000 women aged 15–44, up from 50 in 2001. Disparities in unintended pregnancy rates persisted, with women aged 18–24, poor, or cohabiting having rates two to three times higher than the national average. The unintended pregnancy rate for teens 15–17 decreased notably. The proportion of unintended pregnancies ending in abortion decreased from 47% in 2001 to 43% in 2006, while the unintended birth rate increased from 23 to 25 per 1,000 women aged 15–44. The U.S. has not made progress in reducing unintended pregnancies since 2001. Rates increased for nearly all groups, and the overall rate remains high. Efforts to help women and couples plan pregnancies, such as increasing access to effective contraceptives, should target high-risk groups, particularly poor and cohabiting women. The study combined data from multiple sources, including the National Survey of Family Growth, abortion patient surveys, and birth and abortion statistics. It analyzed unintended pregnancy rates by age, education, race, income, relationship status, parity, and religious affiliation. The results showed that unintended pregnancy rates varied significantly among subgroups, with Black women having the highest rates, and poor and low-income women experiencing substantial increases. The study also examined the outcomes of unintended pregnancies, finding that the proportion ending in abortion decreased, while the unintended birth rate increased. Cohabiting women had the highest unintended pregnancy and birth rates, and poor women had the highest rates overall. The study highlights the need for targeted interventions to reduce unintended pregnancies, particularly among high-risk groups. It also emphasizes the importance of increasing access to effective contraception, especially long-acting methods, to help women and couples avoid unintended pregnancies.In 2006, nearly half (49%) of pregnancies in the United States were unintended, up slightly from 48% in 2001. The unintended pregnancy rate was 52 per 1,000 women aged 15–44, up from 50 in 2001. Disparities in unintended pregnancy rates persisted, with women aged 18–24, poor, or cohabiting having rates two to three times higher than the national average. The unintended pregnancy rate for teens 15–17 decreased notably. The proportion of unintended pregnancies ending in abortion decreased from 47% in 2001 to 43% in 2006, while the unintended birth rate increased from 23 to 25 per 1,000 women aged 15–44. The U.S. has not made progress in reducing unintended pregnancies since 2001. Rates increased for nearly all groups, and the overall rate remains high. Efforts to help women and couples plan pregnancies, such as increasing access to effective contraceptives, should target high-risk groups, particularly poor and cohabiting women. The study combined data from multiple sources, including the National Survey of Family Growth, abortion patient surveys, and birth and abortion statistics. It analyzed unintended pregnancy rates by age, education, race, income, relationship status, parity, and religious affiliation. The results showed that unintended pregnancy rates varied significantly among subgroups, with Black women having the highest rates, and poor and low-income women experiencing substantial increases. The study also examined the outcomes of unintended pregnancies, finding that the proportion ending in abortion decreased, while the unintended birth rate increased. Cohabiting women had the highest unintended pregnancy and birth rates, and poor women had the highest rates overall. The study highlights the need for targeted interventions to reduce unintended pregnancies, particularly among high-risk groups. It also emphasizes the importance of increasing access to effective contraception, especially long-acting methods, to help women and couples avoid unintended pregnancies.