these interactions are essential for maintenance of the corpora lutea ( cl ) , conceptus development and placentation , regulation of uterine endometrial secretory activity , placental transport of nutrients and gases , regulation of uterine blood flow , achievement of immunological `` '' privilege '' '' for the conceptus , stimulation of development of the maternal mammary glands and various other effects on the physiology and endocrinology of the maternal and conceptus systems .
C0032058
placentation
C0032043
placental