Montana

Montana is relatively accommodating with regards to later abortion and abortion in general, although a number of restrictions still exist. Montana has enforced as Constitutional limit on abortion after viability, permitting later abortions in cases where the life and health (physical or mental) are endangered. Montana also requires that a second physician approves the later term abortion. 

Restrictions: 
Constitutionally limits abortion by gestational age after viability
Prohibits later abortion except to preserve a woman's life or health (physical or mental)
Requires second physician to certify necessity of abortion

Montana

Enacted legislation:

Montana is relatively accommodating with regards to later abortion and abortion in general, although a number of restrictions still exist. Montana has enforced as Constitutional limit on abortion after viability, permitting later abortions in cases where the life and health (physical or mental) are endangered. Montana also requires that a second physician approves the later term abortion. 

Pending legislation:

In February 2017, Montana Senator Keith Regier introduced legislation to ban abortions after 20 weeks post-fertilization. The bill contains narrow life and health exceptions and does not contain exceptions for mental health or pregnancies that result from rape or incest. It also creates a cause of action for the “father” to collect damages. In May of 2017, Governor Bullock vetoed this bill.

Restrictions: Constitutionally limits abortion by gestational age after viability | Prohibits later abortion except to preserve a woman's life or health (physical or mental) | Requires second physician to certify necessity of abortion