You have written in Rule No. 426 of your practical treatise that “menstruation blood excretes from a woman’s womb for a few days every month and it is also the food of the fetus during pregnancy”. The consistency of this matter with scientific findings is not clear; therefore, please explain it in more detail. One menstruation period in an adult woman before menopause usually has these stages: A) Stage of increasing the volume of womb; in this stage the womb’s wall thickens because of the secretion of estrogen hormone; thickening of the womb’s wall is for the preparation of the womb to accept the embryo. B) If an embryo is created it will then passes through the womb’s tubes and enters the womb and dwells in its thick and full-of-blood wall. In this place the embryo feeds from nutrients that are carried by the blood and it grows for some time there. In fact the embryo doesn’t feed from the blood itself but from the oxygen and nutrients that are carried by the blood. C) Approximately three weeks after the formation of the embryo, the placenta is created and now it is the duty of the placenta to take food and oxygen from the thickened womb tissue and pass them to the embryo though funiculus. It also transfers CO2 that is produced by the living organs of the embryo back to the mother’s blood. Another duty of placenta is secreting motherhood hormone or progesterone which prevents menstruation. D) If pregnancy doesn’t occur thickened and full-of-blood walls of the womb begins to be destroyed causing what is known as the monthly period. After that bleeding stops, the womb’s wall prepares to accept the next embryo which means it begins to swell up with blood and therefore if a woman becomes pregnant, usually menstruation doesn’t occur because of the secretion of special hormones which have been explained above (clearly, then, the embryo does not drink that blood) and basically there is no bleeding that embryo drinks. E) All the stages described above are controlled by different hormones and if these hormones enter a woman’s body by injection or eating then she doesn’t menstruate, therefore how is it possible to consider blood as the food of the child? A) Stage of increasing the volume of womb; in this stage womb’s wall thickens because of secretion of estrogen hormone; thickening of womb’s wall is for readiness of womb to accept embryo. B) If embryo is created then this embryo passes through womb tubes and enters the womb and dwells in this thick and full-of-blood layer, in this place embryo feeds from nutrition that is carried by blood for some time and grows. In fact embryo doesn’t feed from blood itself and it feeds from oxygen and nutrition that are carried by blood. C) Approximately after three weeks placenta is created and now the duty of placenta is to take food and oxygen from thickened womb tissue and passing them to embryo though funiculus also it transfers CO2 that is produced from living actions of embryo to mother’s blood and another duty of placenta is secreting motherhood hormone or progesterone which prevents menstruation. D) If pregnancy doesn’t occur then thickened and full-of-blood womb’s wall begins to be destroyed and fall which is known as monthly period. After that bleeding is finished, womb’s wall makes itself ready for accepting the next embryo which means begins to be thick and full of blood and therefore if a woman becomes pregnant, usually menstruation doesn’t occur because of secretion of especial hormones that have been foresaid (not that embryo drinks that blood) and basically there is no bleeding that embryo drinks that. E) All stages above are controlled by different hormones and if these hormones enters a woman’s body by injection or eating then she doesn’t menstruate, therefore how it is possible to consider blood as food of the child?