Is the woman who miscarried in the fourth month considered to be in the postpartum period?

Question:
A woman is pregnant with twins: one of them died while in his mother's womb at three months of age, but he was expelled from his mother's womb after the fourth month, and the form of a human being was not discernible in him, while the other remained in his mother's womb. Is the blood flowing from this woman postpartum bleeding or pathological bleeding?

Answer:
If it had developed, it is postpartum bleeding. If a hand, foot, or something else had become apparent in it, it is postpartum bleeding. However, if it was merely blood for three months, but nothing became apparent—no hand, no foot, no head—then it is considered pathological bleeding; she prays, fasts, and performs ablution for every prayer, like a woman with irregular non-menstrual bleeding.
Q: What is the criterion for this development?
A: The presence of something indicating that it is a fetus, so that it becomes postpartum bleeding: such as a head, a hand, a foot, or the like.