So this whole time, baby didn't get her period? 😭

She was tiny. Like 12 years old physically and definitely less than 50kg. Women tend to not get their periods if they are less than 50kg. That is why eating disorders often result in your period stopping

My dumbass just thought her everything inside was like "shrunk" I often tend to forget about those aspects when reading historical manhwas or any type of work really, but thank you for the explanation

It's a valid question.Very often the author does not Expand on certain aspects Of the plot. A good example would be like Those economic stories Where someone Transmigates From the modern world and brings prosperity with modern knowledge but it's actually very shallow because they do not particularly take into a count the impact of such an advant, Like complications with excess farming and will eventually ruin the soil But detail like that are usually skimmed over