Laura Whitehurst, 28, was arrested on Monday night for allegedly having sex with a 16-year-old student, who reportedly fathered her baby.
The teacher was questioned at her home in Redlands, California and then charged with unlawful sexual intercourse with a minor, noted PE.com.
She was released after posting a $25,000 bail.
Whitehurst teaches 10th-grade English at Citrus Valley High School in Redlands, but is now on administrative leave.
According to the Redlands Police Department, her lover was 16 years old during their year-long relationship, which allegedly started last summer. The alleged victim is now 17 and recently graduated high school.
The alleged victim's mom found out about the affair and called the Redlands United School District, which contacted police, reports The Redlands Daily Facts.
Whitehurst gave birth to a child June 18, and police say her former student is the father.
"Nothing is as important to us as the safety of our students and the District takes this arrest very seriously. We are fully cooperating with police in their investigation of this matter," Assistant School Superintendent Sabine Robertson-Phillips told The Redlands Daily Facts.