Anata ga Konoko no Chichioya desu ka?

https://www.cmoa.jp/title/312461/ Her mind is 18, but her body is 22!? Frederica, rescued after collapsing by the river in a terrible state, has lost five years of her memory. She heals her wounds while tending to fields and livestock under the care of a kind couple, but her health doesn't improve easily. One day, she receives unexpected news from her doctor: "You are pregnant." The award-winning online novel is now a manga! A love mystery swirling with intrigue set against the backdrop of the Magic Knights.