22 And God remembered Rachel, and God hearkened to her, and opened her womb.
23 And she conceived, and bare a son; and said, God hath taken away my reproach:
24 And she called his name Joseph; and said, The Lord shall add to me another son.
At long last the Lord saw fit for Rachel to conceive a child of her very own. After watching her sister and the two handmaids be able to what she could not, miraculously her womb was opened, and she gave birth to a son.
And Joseph is to become a mighty man, the greatest of all his brethren. Of course, it will be a long road before he realizes that, and first his brethren will despise and betray him. And it has occurred to me that Joseph might have always been the odd-one out because of his unique heritage. There were six sons born of Leah, two of Zilpah, and two of Bilhah. Thus, every one of the boys had at least one blood brother, except for Joseph.
Joseph would be the one and only son of Rachel until many years later. And having been born after all the other ten, he was surely much younger than the first ones. And that’s not all, there is also the fact that he was the favorite son, born of the favorite wife. Thus, there were many factors to isolate Joseph and make him despised of by his brethren, and it is little wonder that he ended up in such a complicated situation with them later on.