There are many different takes on this in the fanfiction world. It could be that the labor complications are part of a dark and angsty storyline where Hermione doesn't survive. But often, fanfic writers like to subvert expectations. They might have Draco play a crucial role in saving Hermione, perhaps using some magic or a newfound bond between them to overcome the complications.
One possibility could be that in the fanfiction, the labor complications might be caused by a magical curse placed on Hermione during her pregnancy. Draco, being by her side, could use his knowledge of dark and light magic to try and counter the effects. He might have to make difficult choices between following traditional pure - blood magic practices and using Hermione's more liberal magic knowledge to save her and their unborn child.
The labor complications could be such that it forces Draco and Hermione to seek help from the wizarding hospital. There, they encounter different magical treatments and potions. Some healers might be hesitant to treat Hermione because of her Muggle - born status, but Draco would fight for her rights and proper medical attention.
Often, there are plots where there is some sort of magical interference causing Hermione's labor complications. For example, a dark magic spell was cast on her. Draco, who has some knowledge of the dark arts, tries to reverse it. In some stories, the labor complications are a result of a prophecy that involves both of them. The two of them then have to figure out how to break the cycle and save Hermione and the baby.
Often, Hermione's labor complications in fanfiction are related to the magical environment she's in. It could be that a spell backfires during her pregnancy, leading to issues during labor. For example, a protection spell she casts on herself might have unforeseen side - effects.
Regarding Hermione's labor complications leading to death in fanfiction, it's a rather dark and tragic concept. It could be used as a plot device to create a lot of angst and change the course of the story. Maybe in a fanfic where the wizarding world is facing a great threat, and her death during labor could be a symbol of the world losing its hope and intelligence. But not all fanfictions would take this route as Hermione is a beloved character for many fans.
One common plot is that there might be magical interference during Hermione's labor. For example, a dark spell might have been cast on her unknowingly, which causes complications like abnormal pain or stalling of the labor process. Another plot could involve the use of experimental potions that backfire and lead to difficulties. Also, in some fanfictions, the stress of the wizarding world's current situation, like an ongoing battle or political unrest, can add to her labor complications as it affects her mental state, which in turn impacts her physical well - being during childbirth.
One reason could be the traditional rivalry from the original series. In the books, they are from different houses, Slytherin and Gryffindor, which have a long - standing feud. Fanfiction writers might play on this by having Draco be mean as a continuation of that in - built tension. Another aspect could be his family upbringing. The Malfoy family has certain pure - blood supremacist views, and Hermione being a Muggle - born might be a target for Draco's meanness in fanfictions.
Hermione could become withdrawn. She might isolate herself from her friends for a while, spending her time in the library trying to make sense of it all. She might also feel a sense of betrayal, especially if they had some sort of understanding or relationship developing.
Some fanfiction writers show that Harry and Ron are right by her side, using their own magical skills to protect her and the baby. They might use defensive spells against any external threats. For example, Ron could be using his charm - working skills to keep the birthing area warm and comfortable while Harry wards off any dark forces. Others might write that Hermione's parents, if they are part of the wizarding world in that story, are providing emotional support, holding her hand and reassuring her during the difficult time.
She might be initially shocked. After all, Draco is usually seen as this tough Slytherin. But then she could feel sympathy. For instance, she might offer him a handkerchief without saying much at first.