Worldwide, 25 million unsafe abortions (45% of all abortions) occurred every year between 2010 and 2014, according to a new study by WHO and the Guttmacher Institute published in The Lancet journal. The majority of unsafe abortions, or 97%, occurred in developing countries in Africa, Asia and Latin America.

“Increased efforts are needed, especially in developing regions, to ensure access to contraception and safe abortion,” said Dr Bela Ganatra, lead author of the study and a scientist in the WHO Department of Reproductive Health and Research.

“When women and girls cannot access effective contraception and safe abortion services, there are serious consequences for their own health and that of their families. This should not happen. But despite recent advances in technology and evidence, too many unsafe abortions still occur, and too many women continue to suffer and die.”

The new study provides estimates on safe and unsafe abortions globally. For the first time, it includes sub-classifications within the unsafe abortion category as less safe or least safe. The distinction allows for a more nuanced understanding of the different circumstances of abortions among women who are unable to access safe abortions from a trained provider.

When abortions are performed in accordance with WHO guidelines and standards, the risk of severe complications or death is negligible. Approximately 55% of all abortions from 2010 to 2014 were conducted safely, which means they were performed by a trained health worker using a WHO-recommended method appropriate to the pregnancy duration.

Almost one-third (31%) of abortions were “less safe,” meaning they were either performed by a trained provider using an unsafe or outdated method such as “sharp curettage”, or by an untrained person albeit using a safe method like misoprostol, a drug that can be used for many medical purposes, including to induce an abortion.

About 14% were “least safe” abortions provided by untrained persons using dangerous methods, such as introduction of foreign objects and use of herbal concoctions. Deaths from complications of unsafe abortion were high in regions where most abortions happened in the least safe circumstances. Complications from “least-safe” abortions can include incomplete abortion (failure to remove all of the pregnancy tissue from the uterus), haemorrhage, vaginal, cervical and uterine injury, and infections.

The study also looks at the contexts that commonly result in women seeking unsafe abortions, including countries’ laws and policies on abortion, the financial cost of accessing safe abortion services, the availability of safe abortion services and trained health providers, and societal attitudes toward abortion and gender equality.

In countries where abortion is completely banned or permitted only to save the woman’s life or preserve her physical health, only 1 in 4 abortions were safe; whereas, in countries where abortion is legal on broader grounds, nearly 9 in 10 abortions were done safely. Restricting access to abortions does not reduce the number of abortions.

Most abortions that take place in Western and Northern Europe and North America are safe. These regions also have some of the lowest abortion rates. Most countries in these regions also have relatively permissive laws on abortion; high levels of contraceptive use, economic development, and gender equality; as well as high-quality health services – all factors that contribute to making abortion safer.

“Like many other common medical procedures, abortion is very safe when done in accordance with recommended medical guidelines and that is important to bear in mind,” said Dr Gilda Sedgh, co-author of the study and principal research scientist, Guttmacher Institute.

“In the high-income countries of North America and Western and Northern Europe, where abortion is broadly legal and health systems are stron