Police believe Rogers, 22, orchestrated the attack and followed in another vehicle. When questioned by officers, the ex-boyfriend "made incriminating statements that he did not desire a third child," Galasso said. Rogers has two children with other women.
Once her attacker had fled, Bowman got into her vehicle, drove to a phone and called her mother.
Rogers and the alleged attacker, Antonio Mathis, 22, were charged with attempted murder and other crimes. Both men were denied bail and requested court-appointed lawyers.
In court, police said the men were friends and had first discussed the plot in March.
Bowman has burns on her forehead and torso but is expected to recover. The baby boy, delivered in an emergency cesarean section, was in intensive care at a Detroit-area hospital, which Galasso declined to identify. Bowman was three weeks away from her due date.