Reproductive Cycles

Embryology - 2 Dec 2023 Expand to Translate
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Introduction

A simplified cartoon of the menstrual cycle

Sexual reproduction in most species is regulated by regular endocrine changes, or cycles, in the female. These cycles begin postnatally, function for variable times and can then decrease or cease entirely. There are a number of different species-specific female hormonal cycles which can regulate reproduction.

Menstrual Cycle

Human reproduction is regulated in females the menstrual cycle, a regular cyclic hormonal change which coordinate changes in the ovary and internal reproductive tract.

This cycle commences at puberty and ends at menopause.

Links: menstrual cycle | ovary | uterus | puberty

Estrous Cycle

The estrous cycle (British spelling, oestrous) is the main reproductive cycle of females of other non-primate species vertebrates.

For example: rats, mice, horses, pigs all have this form of reproductive cycle.

Links: estrous cycle | mouse estrous cycle

There are also a variety of different estrous forms:

Polyestrous Animals - Estrous cycles throughout the year (cattle, pigs, mouse, rat).
Seasonally Polyestrous Animals - Animals that have multiple estrous cycles only during certain periods of the year (horses, sheep, goats, deer, cats).
Monestrous Animals - Animals that have one estrous cycle per year (dogs, wolves, foxes, and bear)

External Links

External Links Notice - The dynamic nature of the internet may mean that some of these listed links may no longer function. If the link no longer works search the web with the link text or name. Links to any external commercial sites are provided for information purposes only and should never be considered an endorsement. UNSW Embryology is provided as an educational resource with no clinical information or commercial affiliation.

Rob Gilchrist Lecture - From mono-ovulation to poly-ovulation – oocyte regulation of folliculogenesis (Advances in reproductive biology) January 2016 Lisbon, Portugal.

Glossary Links

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Cite this page: Hill, M.A. (2023, December 2) Embryology Reproductive Cycles. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Reproductive_Cycles

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