Video: Ovulation

Demonstrate transcript

Ovulation is the free up of an egg from one in every of the ovaries. It in most cases happens about midway via the menstrual cycle, although the staunch timing might per chance presumably presumably additionally merely fluctuate.

In preparation for ovulation, the lining of the uterus, or endometrium, thickens. The pituitary gland within the brain stimulates one in every of the ovaries to free up an egg. The wall of the ovarian follicle ruptures at the skin of the ovary. The egg is launched.

Finger-delight in structures called fimbriae sweep the egg into the neighboring fallopian tube. The egg travels via the fallopian tube, propelled in fragment by contractions within the fallopian tube walls. Here within the fallopian tube, the egg might per chance presumably presumably additionally be fertilized by a sperm.

If the egg is fertilized, the egg and sperm unite to intention a one-celled entity called a zygote. As the zygote travels down the fallopian tube toward the uterus, it begins dividing rapid to intention a cluster of cells called a blastocyst, which resembles a minute raspberry. When the blastocyst reaches the uterus, it implants within the lining of the uterus and being pregnant begins.

If the egg just is not in truth fertilized, it is merely reabsorbed by the physique — likely sooner than it even reaches the uterus. About two weeks later, the lining of the uterus sheds via the vagina. This is identified as menstruation.

June 27, 2020

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