once a woman attains puberty, her ovaries mature and release one egg per ovarian cycle. which hormone stimulates this event?

Follicle-stimulating Hormone (FSH)

Explanation:

After attaining puberty, the mature ovaries of a woman release one egg per ovarian cycle due to follicle-stimulating hormone. FSH is gonadotrophic hormone, generally produced by the pituitary glands. It regulates the function of ovaries in female and testes in male. Lack of this hormone can lead to infertility both in male and female. At time of  menstrual cycle of a female there is a rise in secretion of  FSH  that stimulates follicular growth in the ovary.

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several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.