An Arlington judge sentenced an Annandale antiabortion activist to six months in jail last week for refusing to pay a fine imposed for her role in a blockade at a Falls Church abortion clinic two years ago.

The activist, ChristyAnne Collins, told the judge she will go to jail rather than pay the fine.

"I wasn't willing to reduce it to a financial transaction. I wasn't willing to pay money to kill children," Collins said yesterday.

Collins was among roughly 100 demonstrators arrested for blocking entry to the Commonwealth Women's Clinic Dec. 3, 1988. She originally was sentenced to at least six months in jail and fined $1,000 for inciting others to trespass, but the sentence was reduced to payment of the fine after she appealed.

Circuit Court Judge Benjamin N.A. Kendrick delayed starting the six-month jail term until Sept. 17 because Collins is recovering from a knee injury and wearing crutches. He said she still may avoid jail or have the term reduced by paying the fine and about $300 in outstanding court-related expenses.

Falls Church City Attorney David R. Lasso said the judge's sentence "is appropriate" considering that Collins "has engaged in refusing to comply with court orders dozens of times." Collins claims she has been arrested about 40 times, mostly in the Washington area, and served a total of about a year in area jails, including four months for actions related to repeated demonstrations at the Falls Church clinic.

Collins said she plans to request another hearing to reduce her jail sentence. "I think six months is purely punitive and far exceeds what the law intended," she said. Her longest sentence was nine months at the District jail, five of which were suspended.

Collins has been an activist for about six years and heads the Sanctity of Life Ministries, an organization that helps pregnant women in crisis situations and which she has represented at antiabortion demonstrations.

Collins said of her most recent conviction that, given the opportunity, she would do the same thing again. "My time is {God's}, whether I'm here dealing with women in crisis pregnancies or whether I'm in jail," she said.