Perhaps in the fanfic, Riza's pregnancy is a result of a dangerous mission where she was exposed to some strange alchemy - related substance that had unexpected side effects. As she progresses through her pregnancy, she has to fight against those who want to use her unborn child for their own dark alchemical purposes. Meanwhile, Roy Mustang is determined to protect her and their future family at all costs.
One possible plot could be that Riza discovers she's pregnant during a time of relative peace in Amestris. She then has to deal with the reactions of her comrades, especially Roy Mustang, who might be both overjoyed and worried about the implications for their future.
I'm not sure specifically if there is a publicly available 'fma riza pregnant fanfic'. You could try searching on some fanfiction websites like Archive of Our Own or FanFiction.net.
Riza being pregnant could also impact the other characters. Her friends like Hawkeye's comrades might become more protective of her. And her enemies could potentially see her pregnancy as a weakness to exploit, leading to some intense and dangerous situations in the fanfiction.
It could be about the Elric brothers and their family. Maybe it shows a different take on their family before the tragedy. For example, it could focus on their daily life, with Hohenheim being a part of it, and how they interacted as a family. It might also include their mother's influence on them.
The plot might involve Gwen being pregnant in a difficult situation, like in a world where having a child is dangerous. She could be trying to protect her unborn baby while also facing external threats. Or perhaps she's pregnant and has to hide it from someone who would not approve, and the story could revolve around her keeping the secret and the challenges that come with it. For example, she may have to lie about her condition during certain events or interactions. Another aspect could be her dealing with the physical and emotional changes that come with pregnancy while still trying to maintain her normal life.
One possible plot could be that Reshiram, in a world where Pokémon have more human - like emotions and relationships, discovers it is pregnant. It could then struggle with how to protect its unborn offspring in a world filled with various threats and challenges. Maybe it has to seek out a safe haven away from other powerful Pokémon who might see the unborn as a threat.
A great plot for a Caroline pregnant fanfic would be the mystery of the baby's father. If it's not clear who the father is at the start, Caroline could go on a journey to figure it out. Along the way, she uncovers secrets about her past relationships and discovers things about herself that she never knew before.
Well, one possible plot could be about Lucy's journey through her pregnancy. Maybe it focuses on how she prepares for the baby, like decorating the nursery. It could also show her dealing with the physical and emotional changes. For example, she might be excited but also a bit scared at the same time.
Well, perhaps in the 'ladybug pregnant fanfic', it could focus on how Ladybug discovers she's pregnant. Maybe it's a surprise, and she has to deal with the emotional turmoil. She starts thinking about how this will change her life as a superhero and her relationships with her friends and family. There could also be a sub - plot about how the city starts to notice small changes in Ladybug's behavior and tries to figure out what's going on.
The plot could start with Manon feeling unwell and then finding out she is pregnant. She might have to hide it at first if she is in a dangerous situation or a world where pregnancy out of wedlock is frowned upon. As the story progresses, she could meet someone who helps her through this difficult time.
One possible plot could be that Katara discovers she's pregnant in a time of relative peace in her world. She then has to deal with the reactions of her friends and family, like how Aang would respond as her partner. There could be challenges she faces during the pregnancy, such as dealing with her own fears and the expectations of her tribe.