Musnad Abu Ya'la al-Mawsili 110:133

On the authority of Ibn Abbas, that the Prophet (peace and blessings of Allah be upon him) said: "Out of ninety-nine women, only one is in Paradise, and the rest of them are in the Fire." This weighed heavily upon those who were present with the Messenger of Allah (peace and blessings of Allah be upon him) from the Emigrants (Muhajirun). The Messenger of Allah (peace and blessings of Allah be upon him) then said: "Indeed, when a Muslim woman becomes pregnant, she has the reward of one who stands in prayer, fasts, is in the state of Ihram, and strives in the way of Allah. When she gives birth, she has, for the first suckling she gives, the reward of giving life to a soul."