KIVO Med
Ovulation and the oocyte
Understand the LH surge, release of the secondary oocyte and the properties of the cell that may be fertilized.
- 84 explained questions
- 36 flashcards
- 112 estimated course minutes
Updated
What you will learn
- Place ovulation in the menstrual cycle and describe its follicular steps.
- Explain follicular rupture and the consequences of the LH surge.
- Describe secondary-oocyte structure, envelopes and biological properties.
- Follow the oocyte from the fimbriae to the tubal ampulla.
Course outline
One ovulation, two linked stories
Place oocyte release in context and introduce the cell that may be fertilized.
6 min
Definition and place in the cycle
Define ovulation and place it between the pre- and post-ovulatory phases.
8 min
The mature Graafian follicle
Recognize the antrum, cumulus oophorus and corona radiata before the LH surge.
8 min
Remodeling of the cumulus oophorus
Describe expansion and isolation of the cumulus–oocyte complex under the LH surge.
10 min
Follicular wall, stigma and ruptured follicle
Follow the mechanical changes that permit ovarian rupture.
10 min
Mechanisms of follicular rupture
Distinguish enzymatic self-destruction, ovarian contraction and intrafollicular pressure.
10 min
LH surge: oocyte maturation
Relate cytoplasmic and nuclear changes to resumption of meiosis.
12 min
LH surge: follicle and corpus luteum
Describe follicular changes and luteinization after ovulation.
12 min
Definition and morphology of the secondary oocyte
Identify the meiotic state and essential cell features of the released oocyte.
10 min
Oocyte envelopes
Distinguish the perivitelline space, zona pellucida, corona radiata and cumulus.
8 min
Biological properties
Retain the oocyte’s viability, metabolism, fertilizability and homogamety.
10 min
Fate after ovulation and summary
Follow tubal retrieval and summarize the conditions for meeting sperm.
8 min
Study and practise with KIVO Med
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Educational resources for medical studies; they do not replace your faculty’s teaching or medical advice.
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Oogenesis and folliculogenesis
Follow the origin, chronology, meiotic divisions, follicular maturation, and regulation of the female germ line.
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Describe sperm production, maturation, kinetics and endocrine regulation.