A significant number of abortion clinic workers have left the industry, with some becoming pro-life advocates, thanks to the efforts of one pro-life group, according to a former Planned Parenthood clinic director in Texas.

Abby Johnson, who is now a pro-life advocate and head of the And Then There Were None (ATTWN) group, said nearly 200 employees have resigned their jobs in abortion clinics across the U.S.—one in 16 abortion clinic employees—in less than four years through her group's efforts, LifeSiteNews reported.

Johnson said about two years ago, Planned Parenthood provided free marketing for ATTWN.

"We are a small organisation with no paid staff and certainly no advertising budget. But God has worked that out for us. Planned Parenthood has sent out multiple 'all staff' emails 'warning' their staff about our ministry and encouraging them not to contact us," she revealed.

She said the tactic "backfired on them."

"We have received dozens of calls from workers who were desperately looking to get out of the industry, but didn't think they could do it alone," she said.

Today, she said, majority of workers go to their pro-life group when they heard about the ministry.

"We owe much of our success to those who go to the clinics to spread a message of hope to all who enter the facility," Johnson said.

Johnson added, "We have found that most of the workers contact us because there has been a moment of clarity for them in regards to the humanity of the unborn. It may be something in their own personal lives, like the birth of a baby or a miscarriage. More often, it involves a child who was killed by abortion."

She said there are about 3,200 people who work in abortion facilities and they have assisted more than 6 percent in their conversion from pro-abortion to pro-life.

Johnson said they aim to accomplish what gay rights advocates have done.

"Just look at the homosexual lobby. Only three percent of the population identifies as homosexual. However, we can see how much they have accomplished in a short time. We have double that percentage! Each worker who converts is a ripple in the paradigm shift towards a culture of life. It will take the conversion of one heart and one mind to make abortion unthinkable in our society," she said.

She said of the 197 workers who have left the industry, six of them were abortionists who permanently put down their life-destroying instruments to become pro-life advocates.

"We firmly believe that our vision is a key component in ending the culture of death. If we can make the abortion industry so unattractive to healthcare providers, they will be forced to close because of limited or no staff. We have already seen that happen in multiple locations because of the workers who have come through ATTWN," she said.