Sa'id bin Jubayr narrates from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both); the narrator says: I think he narrated it as a marfu' hadith. (The Prophet (peace and blessings be upon him) said:) "A woman, from her pregnancy until she gives birth and until she completes (that period), is like one who guards the frontier in the path of Allah; and if she dies during that time, she receives the reward of a martyr."
Al-Tabarani recorded it. Its chain contains Qays bin al-Rabi', whom Shu'bah and al-Thawri declared thiqah (trustworthy) and others declared da'if (weak). Its chain also contains Ishaq bin Ibrahim al-Dabbi, and I do not know him. The rest of its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب النكاح / 7630