In Malay and Indonesian mythology, the Langsuyar is the vampiric reanimated corpse of a woman who died while pregnant or giving birth. Described as beautiful women with ankle length black hair, green robes, and incredibly long hands and nails, they feast on the blood of newborn children.
Ubume is a yokai that’s a ghost of a pregnant woman. She appears as a woman carrying a baby who hands the child off before vanishing. The recipient soon finds the baby is actually a heavy rock or bundle of leaves. To prevent women from becoming Ubume, their unborn child was removed and placed beside them in their grave. From Bakemono No E