By Deborah Netburn

The state of Texas' sustained campaign against Planned Parenthood and other family planning clinics affiliated with abortion providers appears to have led to an increase in births among low-income women who lost access to affordable and effective birth control, a new study says.

The analysis, published Wednesday in the New England Journal of Medicine, documents a significant increase in births among women who had previously received birth control at clinics that no longer get state funding.

The researchers, from the Population Research Center at the University of Texas at Austin, say their findings offer a sneak peak of what may happen in other states that have cut funding to Planned Parenthood. Lawmakers in Arkansas, Alabama, New Hampshire, Louisiana, North Carolina and Utah have enacted policies to keep public funds out of Planned Parenthood clinics. Ohio is expected to be the next state to follow suit.

These laws "definitely" had a real impact on women, said study leader Joseph Potter, a sociologist at the university. "It's not like there is a large, over-capacity of highly qualified providers of effective contraception out there just waiting for people to show up," he said.

The first blow to Planned Parenthood and other family planning clinics in Texas came in 2011, when lawmakers cut family-planning grants by 66 percent across the state. The money that remained was directed toward community health centers and county health departments that provide more comprehensive care.

This dramatic cut in funding was responsible for the closure of 82 family-planning clinics in the state, researchers said. About one-third of them were affiliated with Planned Parenthood.

The state's federally funded Medicaid program was not allowed to steer funds away from Planned Parenthood clinics. So in 2013, the state ditched it and set up the state-funded Texas Women's Health Program, which could legally withhold funds from any clinic affiliated with an abortion provider.

"It was exclusively Planned Parenthood that was hit by that," Potter said.

Though only 23 of the 254 counties in Texas had a Planned Parenthood clinic before 2013, they served 60 percent of the state's low-income women of childbearing age, according to the study.

The researchers make the case that the 2013 policy change made it more difficult for these women to get access to reliable birth control. Without it, they were more likely to get pregnant and have babies.

They focused on women who got hormone injections that prevented them from ovulating for three months at a time.

Among women in Planned Parenthood counties who got the shots in the last three months of 2011, 57 percent got a follow-up shot in the first three months of 2012, when the clinics were still operating. A year later, among women who got a birth control shot in the last three months of 2012, 38 percent got a follow-up shot in the first three months of 2013, after the clinics in their counties had closed.

Meanwhile, women in counties that didn't have a Planned Parenthood in any of those years saw a slight uptick in injectable contraception use.

Without that reliable form of birth control, pregnancies increased and more babies were born, the study authors found. Over 18 months, the proportion of these women who gave birth to a child rose from 7 percent to 8.4 percent in counties that lost a Planned Parenthood.

Meanwhile, in counties that hadn't been served by a Planned Parenthood, the proportion of low-income women who had used hormone injections and then had babies fell from 6.4 percent to 5.9 percent over the same 18-month period.

The researchers calculated that the relative increase in births was 27 percent for women who lost access to Planned Parenthood. Many of these births were probably unplanned, since the increase was only seen in counties where women faced new hurdles in access to contraception, the study authors wrote.

"To see such a large increase in such a short time was surprising," said graduate student Amanda Stevenson, the first author on the paper. "It takes a while for the shot to wear off, and then waiting time to get pregnant, and the pregnancy itself."

Dr. Hal C. Lawrence III, executive vice president of the American Congress of Obstetricians and Gynecologists, said he's not surprised that reduced access to long-acting reversible contraceptives would result in an increase in childbirth.

"These birth control methods are among the most effective ways of preventing unplanned pregnancy," he said.

(c)2016 Los Angeles Times