Title: Ovarian follicle
Content: sometimes called Graafian follicles (after Regnier de Graaf). In humans, oocytes are established in the ovary before birth and may lie dormant awaiting initiation for up to 50 years. After rupturing, the follicle is turned into a corpus luteum. In a larger perspective, the whole folliculogenesis from primordial to preovulatory follicle is located in the stage of meiosis I of ootidogenesis in oogenesis. Embryonic development in males and females follows a common pathway before gametogenesis. Once gametogonia enter the gonadal ridge, however, they attempt to associate with these somatic cells. Development proceeds and the gametogonia turn into oogonia, which become

Title: Human sexuality
Content: causes a Graafian follicle to surface the ovary. The follicle ruptures and the ripe ovum is expelled into the abdominal cavity. The fallopian tubes pick up the ovum with the fimbria. The cervical mucus changes to aid the movement of sperm. On days 15 to 28—the post-ovulatory stage, the Graafian follicle—now called the corpus luteum—secretes estrogen. Production of progesterone increases, inhibiting LH release. The endometrium thickens to prepare for implantation, and the ovum travels down the Fallopian tubes to the uterus. If the ovum is not fertilized and does not implant, menstruation begins. The sexual response cycle is a model

Title: Regnier de Graaf
Content: that he was not the first to describe them, but described their development. From the observation of pregnancy in rabbits, he concluded that the follicle contained the oocyte, although he never observed it. The mature stage of the ovarian follicle is called the "Graafian follicle" in his honour, although others, including Fallopius, had noticed the follicles previously (but failed to recognize its reproductive significance). The term "Graafian follicle" followed the introduction of the term "ova Graafiana" by Albrecht von Haller who like De Graaf still assumed that the follicle was the oocyte itself, although De Graaf realised the ovum was

Title: Folliculogenesis
Content: the follicle. The late-term secondary follicle is marked histologically and structurally by a fully grown oocyte surrounded by a zona pellucida, approximately nine layers of granulosa cells, a basal lamina, a theca interna, a capillary net, and a theca externa. The formation of a fluid-filled cavity adjacent to the oocyte called the antrum designates the follicle as an antral follicle, in contrast to a so-called "preantral follicle" that still lacks an antrum. An antral follicle is also called a "Graafian follicle". Definitions differ as to which stage this shift occurs in, with some designating follicles in the "secondary" stage as

Title: Folliculogenesis
Content: follicle, belongs to the stage of ootidogenesis of oogenesis. In addition, follicles that have formed an antrum are called antral follicles or Graafian follicles. Definitions differ in where this shift occurs in the staging given above, with some stating that it occurs when entering the "secondary" stage, and others stating that it occurs when entering the "tertiary" stage. Until the preovulatory stage, the follicle contains a primary oocyte that is arrested in prophase of meiosis I. During the late preovulatory stage, the oocyte continues meiosis and becomes a secondary oocyte, arrested in metaphase II. At 18–22 weeks post-conception, the cortex

Question: Where do the Graafian follicles develop?
Answer: Ovaries