One common theme is the struggle against vampire nature. Since vampires are often seen as not being able to reproduce in the traditional sense, the mpreg goes against this norm, leading to internal and external conflicts.
Love and family are also important themes. The relationship between the vampire who is pregnant and their partner (if there is one) often deepens during the pregnancy. And the anticipation of starting a new family, even in the face of all the difficulties that come with a vampire mpreg birth, is a central part of many of these stories.
Another theme is the protection of the unborn. In these stories, the vampire carrying the baby has to fight off threats, both from other vampires who might see the pregnancy as an abomination and from outside forces. For example, in many fanfictions, hunters might target the pregnant vampire because they view it as an unnatural occurrence.
One common theme is the exploration of the characters' relationships in a very different context. For example, how the other Avengers react to the pregnancy situation. Another theme could be the challenges the pregnant character faces, like still being part of the superhero team while dealing with the physical and emotional aspects of pregnancy.
One common theme could be the exploration of new relationships. For example, how Spider - Man's relationships with other characters change when he is in a situation of male pregnancy. Another theme might be the struggle with his superhero identity. He has to balance being a superhero and dealing with the physical and emotional changes of pregnancy. Also, the theme of support from his friends and family (or lack thereof) could be explored.
Love and family are also prevalent themes. The mpreg situation usually brings the characters closer together in unexpected ways, forming new family units or strengthening existing ones. For example, a character who was previously a loner might find a new sense of belonging because of the pregnancy. It's also about how love can overcome the challenges presented by this unique situation.
Love and acceptance are common themes. Sasuke and Naruto often have to deal with the fact that their relationship is different due to the vampire aspect and the mpreg situation. They need to accept each other fully and also face the judgment of others in their fictional world.
In mpreg Vampire Knight fanfiction, a frequent theme is the exploration of new powers or abilities. Since it's an unusual situation in the vampire world, the pregnancy might bring out unexpected powers in the pregnant male. It could also be about the discovery of a new side of a character. For example, a tough - looking vampire who becomes pregnant might show a much softer and more nurturing side that was hidden before. This can lead to character development and new relationships forming as other characters see this new side of them.
Another theme is the struggle with the new identity. The pregnant character has to come to terms with this new state of being, which is completely different from what they are used to in the Vampire Diaries universe. They may face internal conflicts about their masculinity and their role in the supernatural world.
The theme of family and identity can also be prevalent. With the mpreg, a new family unit is being formed. The characters may struggle with their new identities as a father - to - be (in Naruto's case) and a vampire who is about to become a parent. And how they define their family in the context of a world that may not be accepting of their situation is also a common theme in such fanfictions.
Well, a usual theme is the struggle. In mpreg painful birth fanfiction, the struggle of the character to come to terms with the unexpected pregnancy is common. And then there's the pain aspect during birth which is often described in detail, showing the character's endurance. Plus, the theme of new beginnings after the birth can also be seen, as the character embarks on a new chapter of life with a new family member.
In tony stark mpreg birth fanfiction, a frequent theme is the adaptation to the new situation. Tony, being a genius and used to being in control, now has to deal with a body that is going through something completely out of his expertise. Also, the theme of protection often comes up, both him protecting the unborn and others protecting him.
In Severus Snape mpreg birth fanfiction, a recurring theme is the exploration of relationships. His relationship with the other characters, such as his friends or former enemies, may change. For instance, some might be more sympathetic than he expected, while others might shun him. Additionally, the theme of motherly/fatherly instincts in Snape is often explored, as he has to adapt to a role that is very different from his usual self.