Who was Hagar? Remember Sarai had purchased a slave in Egypt. Sarah, aged had not borne a child. She for reasons of hierarchy, gave her handmade to Abraham.
Lesson: with Man, there are impossibilities; with God ALL is possible!!
God never changes!
https://www.beliefnet.com/inspiration/7-modern-miracles-that-science-cant-explain.aspx
https://www.christiancourier.com/articles/5-what-does-the-bible-say-about-miracles
Through Hagar in the Bible, we learn that God sees us, He knows us and He cares about us. Through this woman in the Bible, we learn that God is faithful when the rest of the world abandons us. Hagar’s story reminds us that God hears and answers us.
