Jochebed gave birth to the child six months after conception. The Egyptian bailiffs, who kept strict watch over all pregnant women in order to be on the spot in time to carry off their new-born boys, had not expected her delivery for three months more. These three months the parents succeeded in keeping the babe concealed, though every Israelitish house was guarded by two Egyptian women, one stationed within and one without. At the end of this time they determined to expose the child, for Amram was afraid that both he and his son would be devoted to death if the secret leaked out, and he thought it better to entrust the child's fate to Divine Providence. He was convinced that God would protect the boy, and fulfil His word in truth.
Jochebed Gave Birth After Only Six Months of Pregnancy
Legends of the Jews 4:52