Ovarian and Menstrual Cycles

Primary oocytes push their way into the ovary connective tissue and become surrounded by a single layer of primary follicles.

• Follicular Phase

• Ovulation Phase

• Luteal Phase

Follicle-Stimulating Hormone is released from the pituitary gland stimulating the follicle cells to grow and mature.

• Follicular Phase

• Ovulation Phase

• Luteal Phase

As the follicle prodded by FSH grows larger, it accumulate fluid in the central chamber called the antrum, and the primary oocyte it contains replicates its chomosomes and continues meiosis producing a secondary oocyte.

• Follicular Phase

• Ovulation Phase

• Luteal Phase

Luteinizing Hormone (LH) triggers the release of the secondary oocyte from the Vesticular (Graafian) follicle.

• Follicular Phase

• Ovulation Phase

• Luteal Phase

Luteinizing Hormone (LH) triggers the ruptured follicle to change into a corpus luteum which begins to secrete estrogens and progesterone.

• Follicular Phase

• Ovulation Phase

• Luteal Phase

Triggers ovulation to occur

• Follicle-Stimulating Hormone (FSH)

• Estrogen

• Progesterone

• Luteinizing Hormone

• Testosterone

How do primary oocytes differ from secondary oocytes?

• Secondary oocytes are more mature them primary oocytes

• Primary oocytes are more mature them secondary oocytes

• Secondary oocytes are arrested in Prophase I of Meiosis while primary oocytes are arrested in Metaphase II of Meiosis.

• Primary oocytes are arrested in Prophase I of Meiosis while Secondary oocytes are arrested in Metaphase II of Meiosis.

• Primary oocytes are ovulated while Secondary oocytes are not

Follicle cells function to...

• Stimulate oocyte growth and maturity

• Secrete progesterone to prepare for pregnancy

• Stimulate ovulation

• Stimulate changing in the uterine lining

• Nothing

Which hormone causes the re-growth of the endometrial lining of the uterus?

• Testesterone

• GnRH

• Estrogen

• Progesterone

Which hormone signals ovulation?

• FSH

• LH

• Inhibin

• Estrogen