Authorities in Missouri have arrested three relatives after an 11-year-old girl gave birth last week in a bathtub at a home in the St. Louis suburbs, according to multiple reports. An adult man and an adult woman have been charged with endangering the welfare of a child in connection to the case. A 17-year-old boy was also arrested on charges of incest, statutory rape and statutory sodomy of a child younger than 12 years old, according to the St. Louis Post-Dispatch and The Associated Press. The birth was discovered after a man brought the newborn to a hospital, claiming the child had been left on his front porch, KSDK reported. Charging documents obtained by the news station showed the infant had a body temperature of 90 degrees and still had an umbilical cord and placenta attached after being brought to the hospital. The man later admitted that he was related to the baby and told authorities he was unaware the 11-year-old girl was pregnant until she gave birth to the child, according to the AP. The man was arrested and charged with endangering the welfare of a child, KSDK reported. A judge ordered him held in lieu of a $10,000 cash-only bond. Charging documents said he came to the country illegally and had previously been deported, according to the AP. In a probable cause statement obtained by the Post-Dispatch, authorities said a 17-year-old boy related to the 11-year-old girl admitted to having sexually assaulted the girl about 100 times. After his arrest last week, a judge ordered him held in lieu of a $25,000 bond, according to the newspaper. Authorities made a third arrest in the case Tuesday, charging an adult woman with failing to provide the 11-year-old with medical care as she was giving birth. She was ordered held in lieu of a $10,000 bond, according to the AP.