Tennessee didn't and doesn't consider the complications that can arise during pregnancy. Nicole had and continues to have health issues.
Center for Reproductive Rights: 'Nicole's Story':
https://reproductiverights.org/case/emergency-exceptions-abortion-bans-idaho-tennessee-oklahoma/medical-exceptions-id-tn-ok-patients-doctors-stories/#nicole-blackmon
Blackmon v. State of Tennessee: https://reproductiverights.org/case/emergency-exceptions-abortion-bans-idaho-tennessee-oklahoma/blackmon-v-state-of-tennessee/