One common theme could be the relationship dynamics. For example, how Loki's relationship with his partner changes during the pregnancy and childbirth process. Another theme might be the challenges faced during childbirth in a world full of magic and mystery like Loki's. It could involve dealing with unexpected magical occurrences.
One common element is the anticipation and build - up to the birth. It often involves the characters' emotions, like the mother - to - be's fear or excitement.
I'm not sure of specific Loki childbirth fanfiction stories off the top of my head. You could try searching on fanfiction websites like Archive of Our Own. They usually have a wide variety of fanfics, and you can use the search filters to narrow it down to Loki - related ones that might involve childbirth.
One common theme is the struggle between Loki's vampiric nature and his existing identity. He has to deal with new instincts like the thirst for blood while still being the trickster god. Another theme is isolation. As a vampire, he may be shunned or feared, which adds to his sense of being alone. And there's often a theme of power. His vampiric powers can either make him more powerful or put him in dangerous situations.
The concept of changing destinies is also common. Merlin has a pre - set destiny in Camelot, and Loki has his own path in Asgard and the Nine Realms. Fanfictions often play with the idea of how their meeting can alter those destinies. Maybe they can prevent a great tragedy from happening in either realm or create a new future that was not originally foreseen.
Time - related themes are also popular. Since the series involves time - travel and the Time Variance Authority, fanfictions might play with concepts like changing the past or the future. Loki and Mobius could be on a quest to fix time anomalies, and this creates a lot of exciting plot possibilities.
A theme that often comes up is the struggle for acceptance. In the world of Asgard or other settings, a male getting pregnant is not a common occurrence. So Loki has to face the prejudices and lack of understanding from others. Also, there is the theme of self - discovery. Through this unique experience, Loki learns more about his own capabilities and limitations.
One common theme is vulnerability. When Loki is sick, he is no longer the all - powerful figure. This shows a different side of his character that many fans find interesting.
One common theme is the clash of different worlds. Hermione is from the wizarding world in Harry Potter, and Loki is from the Norse mythology - inspired world in Marvel. So, fanfictions often explore how their two very different worlds and cultures interact.
One common theme is the exploration of their differences. Tony is a tech - savvy human, while Loki is a powerful Asgardian (sort of). Their different backgrounds lead to interesting interactions and conflicts.
Redemption is also a theme. Hela is often seen as a villain, and Loki has his own morally ambiguous actions. Fanfictions sometimes focus on one or both of them seeking redemption. They might help each other on this journey, like Loki guiding Hela to see a different path, or Hela teaching Loki about true power and its responsibilities.