The mostly Catholic nation already has one of the most restrictive abortion laws in Europe, with abortion only allowed in rare cases, rape or incest, when the mother's life is in danger or the fetus is badly damaged.
The proposal for further tightening the law came from a citizens' initiative that gathered some 450,000 signatures in this nation of 38 million. It was supported by the Roman Catholic church. But it was highly unpopular with most Poles, with people balking at the idea that a teenage rape victim should be forced to have her baby, or that a woman whose health was badly compromised would be forced to carry to term.
With abortion already illegal in most cases, many women said what frightened them the most in the proposal was that it could have led doctors to be afraid to perform prenatal tests or that women who suffered miscarriages could start to fall under criminal suspicion.
Initially many members of the conservative ruling party, Law and Justice, supported the proposal. Two weeks ago a majority of lawmakers voted to consider it, sending it to a commission for further study. But the party backed away from it under massive social pressure, and lawmakers voted against it 352-58.
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Many in that latter group have been taking to the streets in recent days, and opinion polls show that the party's support has now fallen to its lowest point since it won elections a year ago.
Mariusz Dzierzawski, from the Stop Abortion committee, accused the ruling party leadership of "hypocrisy" for turning its back on his group's proposal.
Prime Minister Beata Szydlo vowed that her government will now take other steps to protect human life. She announced a new plan to earmark more money from the budget for families with disabled children and said it would begin an information campaign that would "promote the protection of life.