It varies -- No limit: Six states and Washington, D.C., do not impose any term restrictions ====== Fertilization: Oklahoma is the only state with a law in effect banning nearly all abortions starting at fertilization.
Six weeks LMP: Texas and Oklahoma are the only states that have laws in effect banning abortions when cardiac activity has been detected in an embryo, which is at around six weeks.
20 weeks: Mississippi is the only state that currently bans abortion at 20 weeks of pregnancy.
22 weeks: Fifteen states ban abortions at 22 weeks of pregnancy.
Over half of states have restrictions in place only at or after viability, or have no limit at all.
24 weeks: Five states ban abortions at 24 weeks of pregnancy.
Viability: Twenty states ban abortions after the fetus is considered viable. Some laws that don't specify a limit say it's up to the abortion provider's "judgment" to determine whether a fetus is viable.
Third trimester: Virginia is the only state that prohibits abortions in the pregnancy's third trimester, which starts at around 25 weeks, per Guttmacher.
No limit: Six states and Washington, D.C., do not impose any term restrictions.