A placenta is made only when a woman gets pregnant. The placenta gives nutrition to a fetus, and an umbilical cord that connects the placenta with the fetus is also used for the stem cell research. Women can produce a very important organ. However, does society care about women's rights enough? This work explores the gender issue by looking at things related to the placenta with aspects of science and culture. In Indonesia, the placenta is often considered as the fetus’ sibling, and it is buried after childbirth. Japan used to have a similar habit until around WW2, too. To collect placenta stories Homma interviewed several women; Japanese women who have experienced childbirth, an Indonesian midwife, a Sundanese traditional midwife called Paraji, an Indonesian PHD student researching stem cells.