Final answer:
The account of Sarah's pregnancy indicates God's intervention to fulfill His promise. It shows the fulfillment of God's covenant with Abraham and underscores the importance of faith.
Step-by-step explanation:
From the account in Genesis about Sarah becoming pregnant by God's intervention, we can infer that Sarah needed God's help because she was unable to conceive a child on her own. This situation is conducive to displaying the power and the promise of God in the narrative. God had promised Abraham that he would be the father of a nation, yet his wife Sarah had not been able to bear children.
Consequently, when God did unto Sarah as He had spoken, it was the fulfillment of a divine promise, illustrating that with God, even the seemingly impossible situations can result in miracles. Sarah's pregnancy is also indicative of the importance of faith and the fulfillment of God's covenant with humanity, particularly with Abraham and his descendants, aligning with the broader themes of covenant and faith in the Hebrew tradition. The act of God granting Sarah a child in her old age was a sign of God's ongoing involvement and commitment to His chosen people.