thanks for your query
Test is based on HCG levels in Urine. After abortion
the levels of HCG Decline Slowly.Initial hCG levels are at the peak at 8 to 10 weeks LMP, as high as 150,000 mIU; therefore even 2 weeks after first-trimester abortion, the hCG levels may still be 1,500 mIU, high enough that all pregnancy tests
will still be positive. When patients have medication abortion, beta hCG
continues to increase following mifepristone but then declines precipitously after administration of misoprostol
.HCG levels can remain positive for up to 6 weeks. In some cases 8 weeks.
But you should take precautions against pregnancy as you can get pregnant right after you have an abortion.