okay I'm going to take a guess at this if I'm wrong add me and I'll fix it now. You can ask me all the questions cuz there's two different meanings I'm coming up with this I don't know if you're talking about the female reproductive system if you are it is called the luteal phase. the name in the Phase comes from a ruptured follicle into a corpus luteurm, it's named for its yellow pigment and lipid deposits. a corpus luteurm secretes hormones that continues preparations for pregnancy