Corpus luteum follicle-stimulating hormone (FSH). A new corpus luteum develops with each menstrual cycle. The "corpus luteum" develops from an ovarian follicle during the luteal phase of the menstrual cycle or oestrous cycle, following the release of a secondary oocyte from the follicle during ovulation. The follicle first forms a corpus hemorrhagicum before it becomes a corpus luteum, but the term refers to the visible collection of blood, left after rupture of the follicle, that secretes progesterone. While the oocyte (later the zygote if fertilization occurs) traverses the Fallopian tube into the uterus, the corpus luteum remains in the ovary. The corpus
Menstrual extraction internationally. This method, another type of manual vacuum aspiration, is most often called menstrual regulation. As with ME, menstrual regulation, when desired as a method of controlling fertility, is performed very early in the menstrual cycle, earlier than a pregnancy test can be performed. One main difference between these two methods is the equipment used. While the Del Em was created such that one is able to put it together from individual pieces and it consists of three parts: the cannula with a one-way valve, a collection jar and the syringe, which are connected by plastic tubing; menstrual regulation is