The state Medical Examining Board Tuesday disciplined five doctors, including fining a Danbury obstetrician $5,000 for her lapses in care in connection with a baby girl’s death during delivery at Greenwich Hospital in June 2015. The board also reprimanded Dr. Marjan Hedayatzadeh and found that she failed to make an adequate assessment of the baby’s well-being and failed to order an ultrasound of the baby and her twin brother, a consent order that Hedayatzadeh agreed to with the board said. The order also said that Hedayatzadeh failed to accurately monitor the baby girl’s heart rate during three hours of labor and delivery, the consent order said. In signing the order, Hedayatzadeh did not contest the allegations or admit wrongdoing, the order said. The doctor has completed courses in fetal heart monitoring in the case of twin pregnancies and is now working under a protocol that requires an ultrasound in the case of all labor and deliveries, the order said.